Big Brother
Season 13
Presented bySonia Kruger
No. of days63
No. of housemates26
WinnerMarley Biyendolo
Runner-upChristina Podolyan
Sarah Jane "SJ" Adams
Country of originAustralia
No. of episodes31[1]
Release
Original networkSeven Network
Original release26 April (2021-04-26) 
29 June 2021 (2021-06-29)
Additional information
Filming datesOctober 2020 (2020-10) 
December 2020 (2020-12)
Season chronology

Big Brother Australia 13, also known as Big Brother 2021, is the thirteenth season of the Australian reality television series Big Brother. It began airing on 26 April 2021 on Seven Network.[2] Sonia Kruger returned as host of the series. The concept for this season is More Than Meets The Eye.

This season revolved around strangers living in a house together with no communication with the outside world as they competed for $250,000. They were constantly filmed during their time in the house and were not permitted to communicate with those filming them. Over the course of the competition, housemates will compete in challenges for power and safety before voting each other out of the house. When three housemates remain, the Australian public decided which finalist would win the grand prize.

The series was filmed from October to December 2020 and aired from April to late June in the following year on Seven Network. The live finale was aired on 29 June 2021, where Marley Biyendolo was declared the winner and won a prize of $250,000 with Christina Podolyan and Sarah Jane "SJ" Adams being declared as the Runners-up. In addition, Biyendolo also won a prize of $10,000 after winning the challenge on Episode 26.

Production

In June 2020, during the release of the twelfth season, it was announced that Big Brother Australia had been renewed for a thirteenth season set to air in 2021.[3] As in the previous season, the show was pre-recorded and was filmed between October and December 2020. On 11 April Seven announced that the season would premiere on 26 April.[4]

International broadcast

The season was broadcast in New Zealand online-only, via TVNZ OnDemand, starting 4 May 2021 with the first four episodes and each subsequent episodes being released within 48 hours of the Australian broadcast.[5] This marked the return of the show to TVNZ after a 16-year absence following the conclusion of the 2005 season.

Impact of the COVID-19 pandemic

The live finale was impacted by the on-going pandemic, as the plan was to broadcast from Hordern Pavilion at Fox Studios in Randwick in front of an audience of 2,000 people with all 26 housemates in attendance. As the result of lockdowns announced on June 24, 2021, it was confirmed the following day that no audience would be in attendance for the finale.[6] In addition, due to inter-state travel restrictions nine housemates opted to appear via video link despite an initial desire from Endemol Shine Australia to still have everyone appear in-person.[7] Lillian Ahenkan, the second evictee of the series, did not participate in the finale as she was given the option to not attend in-person due to the lockdowns - but did not appear via video link like other housemates that were unable to attend in-person.[8]

Housemates

On 14 March 2021, Channel Seven revealed Sarah Jane Adams as the first housemate for the series.[9][10] More housemates were revealed over the following weeks, with the full cast of the 20 original Housemates being introduced on 25 April.[11] Among the Intruders, Brenton was revealed in pre-show material, whilst the other 5 intruders were revealed on 15 May, a few days before their introduction on the show on Episode 12.[12]

Two pre-existing relationships were a part of the game in a minor twist: Max and Katie are ex-boyfriend and girlfriend and intruders Alex and Charlotte M are twin sisters. Other than the personal effects of their relationships, there was no direct effect on the mechanics of the game.

Name Age on entry Residence Day entered Day exited Result Source
Marley Biyendolo 25 Melbourne 4 63 Winner [13]
Christina Podolyan 21 Melbourne 1 63 Runner-up
Sarah Jane "SJ" Adams 65 Sydney 1 63 Runner-up [9][10]
Ari Kimber 22 Sydney 4 63 Evicted
Daniel "Danny" Hayes 48 Geelong 1 62 Evicted [14]
Sid Pattni 34 Perth 1 61 Evicted
Adriana Fernandez 53 Wollongong 27 60 Evicted
Tilly Whitfeld 20 Sydney 4 58 Evicted [15][16]
Charlotte McCristal 25 Melbourne 27 51 Evicted
Mary Kalifatidis 55 Melbourne 4 50 Evicted
Jess Trend 29 Melbourne 4 45 Evicted
Brenton Balicki 31 Sydney 27 42 Evicted [17][18]
Mitch Giles 26 Perth 27 40 Evicted
Gabe Criste 27 Brisbane 27 33 Walked
Charlotte Hall 23 Brisbane 4 33 Evicted
Alex McCristal 25 Melbourne 27 32 Evicted
Katie Williams 26 Sydney 1 26 Evicted [19][20]
Melissa McGorman 33 Cambrai 1 24 Evicted [21][22]
Nick Benton 29 Adelaide 1 22 Evicted [23][24]
Mitchell Spencer 26 Cairns 1 19 Evicted
Carlos Castro 39 Perth 1 16 Evicted
Christopher Wayne 37 Brisbane 4 12 Evicted
Michael Brown 29 Perth 4 10 Evicted
Renata Bubeniene 45 Adelaide 1 7 Evicted
Lillian Ahenkan 26 Sydney 1 5 Evicted [25][20]
Max Beattie 28 Gold Coast 1 3 Evicted

Future appearances

Daniel Hayes competed in Big Brother: VIP. He was the fourth housemate to be evicted from the house. In 2022, Marley Biyendolo competed on The Challenge: Australia.[26]

Episodes

No.
overall
No. in
season
TitleTimelineOriginal air date
Week 1
15601Episode 1Day 1–326 April 2021 (2021-04-26)
Twelve housemates enter the Big Brother house. Daniel is given a secret mission to take another housemate, Nick, to Big Brother's Boiler room and be immune from the first eviction. While they are away, their Housemates compete in the first Nominations Challenge to retrieve and stack 17 eye-shaped blocks between 2 posts in the ground. On their return, they are shocked to find that they are the only ones allowed to cast votes in the eviction.
15612Episode 2Day 4–527 April 2021 (2021-04-27)
Big Brother gives Melissa a secret mission to hide sheep of different sizes around the House. Later that night, eight new Housemates board BB Air on a 24-hour flight before they enter the house. The next day, the current housemates participate in a Nominations Challenge in which they must balance on progressively smaller hanging balls. After the eviction, the new Housemates are released into the House.
15623Episode 3Day 6–828 April 2021 (2021-04-28)
Big Brother placed thousands of balloons in the house. Inside of eighteen of them were golden cinema tickets. If the housemates find a balloon with a ticket, Big Brother would award them a movie night. The next day, the housemates had to hold on to a rope attached to a bar weighing 30% of each housemate's body weight. If the housemates drop the rope, they would be eliminated from the challenge. The last housemate standing would win the challenge.
Week 2
15634Episode 4Day 9–102 May 2021 (2021-05-02)
It's the beginning of Surprise week, and Big Brother wakes the Housemates by playing Walking on Sunshine into the House. Nick goes on the offensive, targeting the divide between the originals and those who came on the plane. In the House Task, Housemates must perform a rendition of the song while putting their hands in boxes of critters and other items designed to distract them. The housemates deal with low food levels, eating only spinach straight from the bag, tinned tuna and Mary's pumpkin soup. The nominations challenge features two teams of Housemates in a series of battles of strength, pushing a platform to the end of a rail. The team that wins three times winning the challenge overall and collectively winning the nomination power. At the eviction, Daniel says that it is a coincidence that only Housemates from the plane got nominated. Tilly bares her heart and rattles off all the things she's learnt about all her other Housemates.
15645Episode 5Day 11–123 May 2021 (2021-05-03)
Surprise Week continues in the House, and some Housemates have decided to make their own surprises on each other. Daniel decides to sneak up on Katie and scare her out of bed, while Jess and Marley frighten Christina as she enters the small lounge room. In the house task, Housemates are to ignore anything out of the ordinary that happens in the House, such as spider webs in the Diary Room or surprise visitors, to receive a meal from KFC. In the Nominations Challenge, the housemates work in pairs to balance 10 balls on one end of a seesaw. In the eviction room, Sarah Jane says she's learning about the strategy of the game now. Christopher says that he is going for the Housemates who are going after him.
15656Episode 6Day 13–144 May 2021 (2021-05-04)
Big Brother calls Charlotte to the Diary Room, asks her to choose a fellow Housemate to give a makeover, so she chooses Nick. Charlotte, with Ari's help, styles Nick in different outfits. Meanwhile, the Housemates are losing their patience over the food rations. In the House Task, Housemates must help test a new security system for Big Brother. When an alarm sounds, the Housemate indicated on the screen in the living room must press the button to disable it before time runs out. Each alarm disabled earns AU$10 for the upcoming shopping. After 12 hours, the house receives a total of $220 in the challenge. The nominations challenge requires pairs of Housemates to stand on a sloped apparatus by distributing their weight using a rope.
15667Episode 7Day 15–165 May 2021 (2021-05-05)
Week 3
15678Episode 8Day 18–199 May 2021 (2021-05-09)
15689Episode 9Day 20–2110 May 2021 (2021-05-10)
156910Episode 10Day 22–2411 May 2021 (2021-05-11)
157011Episode 11Day 25–2612 May 2021 (2021-05-12)
Week 4
157112Episode 12Day 27–2817 May 2021 (2021-05-17)
157213Episode 13Day 29–3018 May 2021 (2021-05-18)
157314Episode 14Day 31–3219 May 2021 (2021-05-19)
Week 5
157415Episode 15Day 32–3324 May 2021 (2021-05-24)
157516Episode 16Day 34–3725 May 2021 (2021-05-25)
157617Episode 17Day 38–4026 May 2021 (2021-05-26)
Week 6
157418Episode 18Day 41–4231 May 2021 (2021-05-31)
157519Episode 19Day 43–451 June 2021 (2021-06-01)
157620Episode 20Day 46–472 June 2021 (2021-06-02)
Week 7
157821Episode 21Day 48–507 June 2021 (2021-06-07)
157922Episode 22Day 518 June 2021 (2021-06-08)
158023Episode 23Day 52–539 June 2021 (2021-06-09)
Week 8
158124Episode 24Day 54–5514 June 2021 (2021-06-14)
158225Episode 25Day 56–5715 June 2021 (2021-06-15)
158326Episode 26Day 5816 June 2021 (2021-06-16)
Week 9
158427Episode 27Day 59–6021 June 2021 (2021-06-21)
158528Episode 28Day 6122 June 2021 (2021-06-22)
158529Episode 29Day 6223 June 2021 (2021-06-23)
Week 10
158530Episode 30Day 6328 June 2021 (2021-06-28)
158531Episode 31 – FinaleN/A29 June 2021 (2021-06-29)

Voting history

  This housemate was nominated for eviction.
  This housemate won the Challenge on this round.
  This housemate was immune from this round of eviction.
  This housemate was not in the Main House and did not participate in this round of eviction.
  This housemate was originally nominated but was saved from eviction.
Week 1 Week 2 Week 3 Week 4 Week 5 Week 6 Week 7 Week 8 Week 9 Week 10
Episode 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Finale
Challenge
Winner(s)
Renata Melissa Jess Blue Team Melissa
Tilly
Christina
Daniel
Tilly Tilly Katie Ari Daniel
Marley
Mitch Brenton Mitch Mitch
Marley
Tilly Tilly Red Team Christina Ari
Christina
Marley Tilly Daniel Sid Christina
Adriana
Marley Daniel Christina Ari
Christina
Marley (none)
Nominations Christina
Max
Melissa
Katie
Lillian
Sarah Jane
Melissa
Renata
Sid
Mary
Michael
Tilly
Charlotte H
Christopher
Sarah Jane
Mary
Sarah Jane
Sid
Mary
Sid
Carlos
Charlotte H
Jess
Mitchell
Sarah Jane
Sid
Ari
Melissa
Nick
Daniel
Marley
Melissa
Ari
Charlotte H
Katie
Adriana
Alex
Brenton
Charlotte M
Gabe
Alex
Charlotte M
Gabe
Ari
Charlotte H
Gabe
Adriana
Ari
Christina
Ari
Brenton
Mitch
Brenton
Christina
Mitch
Brenton
Christina
Sarah Jane
Ari
Jess
Sarah Jane
Marley
Mary
Sarah Jane
Ari
Christina
Mary
Adriana
Charlotte M
Christina
Daniel
Marley
Sarah Jane
Daniel
Marley
Tilly
Ari
Marley
Sarah Jane
(none) Adriana
Christina
Sarah Jane
Ari
Daniel
Sid
Daniel
Sarah Jane
Ari
Christina
Sarah Jane
Marley Not in
House
BB Air Renata Tilly Charlotte H Sid Sid Carlos Mitchell Nick Melissa Nominating
Housemate
Gabe Gabe Charlotte H Nominating
Housemate
Brenton Brenton Brenton Sarah Jane Sarah Jane Nominating
Housemate
Christina Nominated Daniel Ari No
voting
Adriana Ari Sarah Jane Ari Winner
(Finale)
Christina Nominated Lillian Renata Michael Christopher Nominating
Housemate
Mary Carlos Mitchell Nick Daniel Katie Adriana Gabe Gabe Adriana In Panic
Room
Mitch Sarah Jane Nominating
Housemate
Nominating
Housemate
Mary Charlotte M Sarah Jane Tilly Sarah Jane No
voting
Nominated Nominating
Housemate
Daniel Nominated Runner-up
(Finale)
Sarah Jane Ineligible Lillian Renata Tilly Christopher Mary In Attic Mitchell Nick Melissa Katie Adriana Gabe Gabe Christina Mitch Mitch Brenton Nominated Marley Mary Charlotte M Nominated Marley Ari No
voting
Adriana Sid Nominated Nominated Runner-up
(Finale)
Ari Not in
House
BB Air Renata Michael Christopher Sarah Jane Mary Carlos Mitchell Nick Nominating
Housemate
Katie Adriana Gabe Not
eligible
Christina Mitch Mitch Brenton Not
eligible
Nominating
Housemate
Mary Charlotte M Marley Tilly Sarah Jane In Mirrored Room Adriana Nominated Daniel Nominated Evicted
(Day 63)
Daniel Max Lillian Sid Michael Christopher Nominating
Housemate
Mary Jess Sarah Jane Medically
Isolating
Melissa Nominating
Housemate
Adriana Alex Charlotte H Christina Mitch Mitch Christina Jess Marley Mary Charlotte M Nominated Marley Ari No
voting
Nominating
Housemate
Sid Nominated Evicted
(Day 62)
Sid Ineligible Lillian Renata Tilly Charlotte H Sarah Jane Nominated Carlos Mitchell Nick Melissa Katie Gabe Gabe Gabe Christina Brenton Mitch Brenton Jess Sarah Jane Christina Christina Marley Nominating
Housemate
Ari No
voting
Adriana Nominated Evicted
(Day 61)
Adriana Not in
House
Nominated Gabe Gabe Christina Mitch Mitch Sarah Jane Jess Marley Mary Charlotte M Sarah Jane Tilly Nominating
Housemate
No
voting
Nominated Evicted
(Day 60)
Tilly Not in
House
BB Air Renata Michael Nominating
Housemate
Sarah Jane Sid Nominating
Housemate
Nominating
Housemate
Melissa Melissa Katie Gabe Alex Charlotte H Ari Nominating
Housemate
Nominating
Housemate
Brenton Sarah Jane Sarah Jane Christina Nominating
Housemate
Marley Daniel In Mirrored Room Evicted
(Day 58)
Charlotte M Not in
House
Nominated Charlotte H Ari Brenton Brenton Brenton Sarah Jane Sarah Jane Christina Christina Evicted
(Day 51)
Mary Not in
House
BB Air Renata Michael Charlotte H Sarah Jane Nominated In Attic Mitchell Nick Melissa Charlotte H Adriana Gabe Gabe Christina Mitch Mitch Brenton Jess Sarah Jane Christina Evicted
(Day 50)
Jess Not in
House
BB Air Nominating
Housemate
Tilly Charlotte H Sarah Jane Sid Carlos Mitchell Nick Melissa Ari Adriana Alex Charlotte H Christina Brenton Brenton Brenton Nominated Evicted
(Day 45)
Brenton Not in
House
Nominated Intruder
Winner
Charlotte H Adriana Mitch Mitch Sarah Jane Evicted
(Day 42)
Mitch Not in
House
Intruder
Winner
Alex Nominating
Housemate
Nominating
Housemate
Brenton Brenton Evicted
(Day 40)
Gabe Not in
House
Nominated Nominated Walked
(Day 33)
Charlotte H Not in
House
BB Air Renata Michael Christopher Sarah Jane Sid Carlos Mitchell Nick Melissa Katie Adriana Gabe Nominated Evicted
(Day 33)
Alex Not in
House
Nominated Evicted
(Day 32)
Katie Ineligible Lillian Renata Tilly Charlotte H Sid Sid Carlos Mitchell Nominating
Housemate
Melissa Ari Evicted
(Day 26)
Melissa Nominated Nominating
Housemate
Renata Michael Nominating
Housemate
Sarah Jane Mary Jess Sarah Jane Nick Daniel Evicted
(Day 24)
Nick Abstained Lillian Renata Michael Christopher Mary Mary Charlotte H Sarah Jane Ari Evicted
(Day 22)
Mitchell Ineligible Lillian Renata Michael Christopher Sarah Jane Mary Jess Sarah Jane Evicted
(Day 19)
Carlos Ineligible Katie Melissa Tilly Christopher Mary Mary Jess Evicted
(Day 16)
Christopher Not in
House
BB Air Renata Tilly Charlotte H Evicted
(Day 12)
Michael Not in
House
BB Air Renata Tilly Evicted
(Day 10)
Renata Nominating
Housemate
Katie Sid Evicted
(Day 7)
Lillian Ineligible Sarah Jane Evicted
(Day 5)
Max Nominated Evicted
(Day 3)
Notes [lower-alpha 1] [lower-alpha 2] None [lower-alpha 3] [lower-alpha 4] [lower-alpha 4] [lower-alpha 5] [lower-alpha 6] [lower-alpha 4] [lower-alpha 5] [lower-alpha 6] [lower-alpha 7] [lower-alpha 6] None [lower-alpha 8] None [lower-alpha 4] [lower-alpha 9] [lower-alpha 10] [lower-alpha 11][lower-alpha 12] [lower-alpha 4] [lower-alpha 5] [lower-alpha 13] [lower-alpha 13] [lower-alpha 14] [lower-alpha 3] [lower-alpha 15] [lower-alpha 4] [lower-alpha 16] [lower-alpha 16] [lower-alpha 16] [lower-alpha 17] [lower-alpha 18] [lower-alpha 18] [lower-alpha 19] [lower-alpha 20] [lower-alpha 19] [lower-alpha 19] [lower-alpha 21] [lower-alpha 22] [lower-alpha 23] [lower-alpha 24]
Source [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] [37] [38] [39] [40] [41] [42] [43] [44] [45] [46] [47] [48] (none) [49] (none) [50] (none)
Walked none Gabe none
Evicted Max
1 of 2 votes
to evict
Lillian
7 of 10 votes
to evict
Renata
14 of 17 votes
to evict
Michael
9 of 17 votes
to evict
Christopher
8 of 14 votes
to evict
Sarah Jane
8 of 13 votes
to fake evict
Mary
6 of 11 votes
to fake evict
Carlos
7 of 12 votes
to evict
Mitchell
9 of 13 votes
to evict
Nick
9 of 11 votes
to evict
Melissa
9 of 11 votes
to evict
Katie
6 of 9 votes
to evict
Alex
Brenton
Charlotte M
0 of 10 votes
to enter each
Charlotte M
0 of 12 votes
to enter
Alex
Lost intruder
challenge
Christina
7 of 11 votes
to be a
Walking Dead
Mitch
6 of 11 votes
to be a
Walking Dead
Brenton
Tilly's choice
to be a
Walking Dead
Brenton
8 of 12 votes
to evict
Jess
4 of 7 votes
to evict
Sarah Jane
5 of 8 votes
to fake evict
Mary
5 of 9 votes
to evict
Charlotte M
5 of 8 votes
to evict
Marley
3 of 5 votes
to receive The Eye
Tilly
3 of 7 votes
to fake evict
Ari
4 of 6 votes
to fake evict
Tilly
Lost
Challenge
Adriana
4 of 4 votes
to evict
Sid
2 of 3 votes
to evict
Daniel
2 of 3 votes
to evict
Ari
Marley's choice
to evict
Sarah Jane
Fewest votes
to win
Christina
Fewest votes
to win
Gabe
3 of 10 votes
to enter
Alex
4 of 12 votes
to enter
Charlotte H
6 of 11 votes
to evict
Mitch
8 of 12 votes
to evict
Saved Christina
0 of 2 votes
to evict
Katie
2 of 10 votes
to evict
Sid
2 of 17 votes
to evict
Tilly
8 of 17 votes
to evict
Charlotte H
6 of 14 votes
to evict
Mary
3 of 13 votes
to fake evict
Sid
5 of 11 votes
to fake evict
Jess
4 of 12 votes
to evict
Sarah Jane
4 of 13 votes
to evict
Ari
1 of 11 votes
to evict
Daniel
2 of 11 votes
to evict
Ari
2 of 9 votes
to evict
Mitch
Won intruder
challenge
Brenton
Won intruder
challenge
Charlotte M
Won intruder
challenge
Adriana
2 of 11 votes
to be a
Walking Dead
Brenton
5 of 11 votes
to be a
Walking Dead
Brenton
4 of 12 votes
to evict
Sarah Jane
3 of 12 votes
to evict
Sarah Jane
3 of 7 votes
to evict
Marley
3 of 8 votes
to fake evict
Christina
4 of 9 votes
to evict
Christina
3 of 8 votes
to evict
Sarah Jane
2 of 5 votes
to receive
The Eye
Daniel
2 of 7 votes
to fake evict
Sarah Jane
2 of 6 votes
to fake evict
Ari
Won
Challenge
Christina
0 of 4 votes
to evict
Ari
1 of 3 votes
to evict
Sarah Jane
1 of 3 votes
to evict
Christina
Marley's choice
to save
Marley
Most votes
to win
Melissa
0 of 2 votes
to evict
Sarah Jane
1 of 10 votes
to evict
Melissa
1 of 17 votes
to evict
Mary
0 of 17 votes
to evict
Sarah Jane
0 of 14 votes
to evict
Sid
2 of 13 votes
to fake evict
Charlotte H
1 of 12 votes
to evict
Sid
0 of 13 votes
to evict
Melissa
1 of 11 votes
to evict
Marley
0 of 11 votes
to evict
Charlotte H
1 of 9 votes
to evict
Adriana
7 of 10 votes
to enter
Gabe
8 of 12 votes
to enter
Gabe
5 of 11 votes
to evict
Ari
2 of 11 votes
to be a
Walking Dead
Ari
0 of 11 votes
to be a
Walking Dead
Christina
0 of 12 votes
to evict
Christina
1 of 12 votes
to evict
Mary
0 of 8 votes
to fake evict
Ari
0 of 9 votes
to evict
Adriana
0 of 8 votes
to evict
Daniel
0 of 5 votes
to receive The Eye
Marley
2 of 7 votes
Nullified
Marley
0 of 6 votes
to fake evict
Sarah Jane
Marley's choice
to save
Notes
  1. Daniel entered the Diary Room first and was given a mission to win immunity for himself and another Housemate. The mission was to hide in the Boiler Room until the first Eviction. He chose Nick and the pair completed the mission. Daniel & Nick returned to the house at the Eviction Ceremony, where they were given the only two votes for the eviction, with an option to abstain from voting. Had both abstained, no one would be evicted. Daniel cast the only vote to evict Max.
  2. 8 New Housemates spent 24 Hours completing the BBAir Task and entered the main house after Lillian's Eviction.
  3. 1 2 This was a Team Challenge. The Winning Team collectively held the power to nominate. All housemates cast votes in the Eviction.
  4. 1 2 3 4 5 6 This was a Pairs Challenge. The winning pair had to agree on nominations.
  5. 1 2 3 Due to the odd number of Housemates for a Pairs Challenge, the Housemate indicated by   was randomly drawn to not participate and receive Immunity.
  6. 1 2 3 This was a Fake Double Eviction. Following Sarah Jane's eviction, a second vote between surviving nominees Sid & Mary was held. As their votes would cancel the others out, Sid & Mary did not vote in this vote. After being voted out, Sarah Jane & Mary secretly moved to the Attic & returned following Carlos's eviction.
  7. As the vote was tied, the nominating housemate cast a tie-break vote.
  8. After falling ill, Dan was isolated from the other Housemates & tested for Covid-19. As he missed the Nomination Challenge & the Eviction Ceremony, he was ineligible to be evicted and to vote.
  9. On Episode 12, 6 Intruders entered the game. During Episodes 12 & 13, the Intruders competed in Two Intruder Challenges & Two House Votes (where the Original Housemates would vote for an Intruder to stay) to determine which 4 would stay in the game.[12]
  10. After the 2nd Intruder Vote, Big Brother gave Alex & Charlotte M a final chance to enter the game with a Challenge.
  11. Ari was originally nominated. However, as his challenge build was faulty, Big Brother voided his Nomination (as he was unable to win). In exchange for his safety, Ari did not vote. The eviction continued with Charlotte H & Gabe nominated, with the nominees not voting as their votes would cancel the others out.
  12. After Episode 14's Eviction, Gabe quit the game.
  13. 1 2 This was a Walking Dead Vote. Housemates voted to be the Walking Dead Housemates were exiled in the Halfway House until the end of the week, where Three Walking Dead Housemates are facing an Eviction Vote.
  14. The winner of this Challenge won the power to directly name the Final Walking Dead Housemate, Nominating them for that night's Walking Dead Eviction. This Nomination is indicated in Bold.
  15. As the Housemate who did not enter the Panic Room Task, Big Brother gave Dan the key to a secret Bunker. He could give the key to a nominee, allowing them to hide for the Eviction, vetoing their Nomination. Dan gave the key to Ari. As he was hidden, Ari did not vote. The eviction continued with Jess & Sarah Jane nominated, with the nominees not voting as their votes would cancel the others out.
  16. 1 2 3   This was a Fake Eviction. The Housemate with the most votes would instead, become Head of House, along with another Housemate of their choice. Sarah Jane selected Daniel. The HoH position included Immunity for the duration of their reign as well as other perks & privileges revealed during their reign.
  17. Heads of House Sarah Jane & Daniel had the power to nominate the 3rd Nomination. This Nomination is indicated in Bold
  18. 1 2 Episode 23 was not an Eviction Episode. Instead, the Challenge Winner & Two Nominees of their choice were Nominated for a special vote to receive a Game Advantage called The Eye - The Eye allowed the holder to cancel the votes against a nominee at one of the Next Two Evictions. Marley was voted to receive The Eye and used it on himself on Episode 24’s Vote.
  19. 1 2 3 Episodes 24 and 25 were both fake eviction episodes with both evictees (Tilly and Ari) being secretly sent to the Mirror Room upon being voted off. In Episode 26, Tilly & Ari participated in a Russian Roulette game to determine which of the two would officially be evicted.
  20. Sarah Jane won a Replay Advantage in Episode 25’s Task - allowing her to nullify the results of a Nomination Challenge and force everyone to replay the Challenge. Christina won the first run of the challenge, before Sarah Jane used the replay. Adriana won the second run of the challenge and won the Nomination Power.
  21. In this episode's challenge, the housemates were competing to win a $10,000 prize instead of the power to nominate.
  22. For the Final Week of the Game, the Three Nominated Housemates were given a chance to save themselves in a Veto Showdown Challenge. The winner of this challenge (represented by strikethrough) would veto their nomination and would not face the House's Vote. This would leave two nominees for the House's Vote, with the nominees not voting as their votes would cancel the others out.
  23. The winner of Final Challenge won their place in the Final as well as the sole vote at the Final Eviction. The other three housemates were nominated for the Final Eviction.
  24. For the finale, Australia voted for the winner of Big Brother Australia 2021 and the $250,000 grand prize.

Reception

Ratings

Ratings data is from OzTAM and represents the viewership from the 5 largest Australian metropolitan centres (Sydney, Melbourne, Brisbane, Perth and Adelaide).

Wk Ep Air date Timeslot Segment Overnight ratings Consolidated ratings Total ratings Ref(s)
Viewers Rank Viewers Rank Viewers Rank
1 1 26 April 2021 Monday 7:30pm Arrival 664,000 8 94,000 2 758,000 7 [51][52]
Episode 662,000 9 74,000 3 736,000 8
Eviction 650,000 10 73,000 4 723,000 9
2 27 April 2021 Tuesday 7:30pm 622,000 9 66,000 6 690,000 8 [53][54]
3 28 April 2021 Wednesday 7:30pm 558,000 11 65,000 4 623,000 10 [55][56]
2 4 2 May 2021 Sunday 7:00pm 534,000 6 67,000 5 590,000 7 [57][58]
5 3 May 2021 Monday 7:30pm 552,000 13 71,000 5 623,000 11 [59][60]
6 4 May 2021 Tuesday 7:30pm 515,000 14 63,000 6 578,000 11 [61][62]
7 5 May 2021 Wednesday 7:30pm 556,000 10 47,000 7 604,000 10 [63][64]
3 8 9 May 2021 Sunday 7:00pm 531,000 6 71,000 6 602,000 7 [65][66]
9 10 May 2021 Monday 7:30pm 638,000 9 56,000 6 694,000 8 [67][68]
10 11 May 2021 Tuesday 7:30pm 558,000 10 52,000 5 610,000 10 [69][70]
11 12 May 2021 Wednesday 7:30pm 562,000 10 54,000 6 616,000 9 [71][72]
4 12 17 May 2021 Monday 7:30pm 592,000 11 63,000 5 655,000 10 [73][74]
13 18 May 2021 Tuesday 7:30pm 583,000 7 79,000 5 662,000 6 [75][76]
14 19 May 2021 Wednesday 7:30pm 539,000 13 73,000 4 612,000 9 [77][78]
5 15 24 May 2021 Monday 7:30pm 591,000 13 81,000 3 671,000 9 [79][80]
16 25 May 2021 Tuesday 7:30pm 575,000 10 83,000 5 658,000 8 [81][82]
17 26 May 2021 Wednesday 7:30pm 558,000 14 88,000 4 646,000 9 [83][84]
6 18 31 May 2021 Monday 7:30pm 590,000 14 67,000 3 657,000 12 [85][86]
19 1 June 2021 Tuesday 7:30pm 583,000 10 75,000 5 657,000 9 [87][88]
20 2 June 2021 Wednesday 7:30pm 602,000 10 80,000 3 682,000 9 [89][90]
7 21 7 June 2021 Monday 7:30pm 620,000 8 56,000 4 676,000 9 [91][92]
22 8 June 2021 Tuesday 7:30pm 569,000 13 74,000 3 643,000 9 [93][94]
23 9 June 2021 Wednesday 7:30pm 510,000 15 100,000 1 610,000 9 [95][96]
8 24 14 June 2021 Monday 7:30pm 568,000 17 74,000 2 642,000 14 [97]
25 15 June 2021 Tuesday 7:30pm 617,000 9 66,000 5 683,000 9 [98]
26 16 June 2021 Wednesday 7:30pm 597,000 12 72,000 3 670,000 9 [99]
9 27 21 June 2021 Monday 7:30pm 613,000 12 63,000 3 675,000 11 [100]
28 22 June 2021 Tuesday 7:30pm 568,000 10 63,000 5 631,000 9 [101]
29 23 June 2021 Wednesday 7:30pm 652,000 8 53,000 4 705,000 8 [102]
10 30 28 June 2021 Monday 7:30pm 667,000 8 20,000 9 687,000 13 [103]
31 29 June 2021 Tuesday 7:30pm Finale 672,000 8 20,000 7 701,000 8 [104]
Winner Announced 726,000 7 14,000 8 804,000 6

Accolades

Year Award Category Nominee(s) Result Ref.
2022 TV Tonight Awards: Worst of 2021 Worst Australian Show Big Brother Nominated [105]

Controversy

Alleged game rigging from production

This season of Big Brother has several alleged instances of the production team favouring game events for particular Housemates, including Daniel. One alleged incident is that of the Panic Room task in Episode 19. The alleged incident reported that Daniel wanted to enter the room early in the task, before being asked to go to the Diary Room. After the Diary Room visit, Daniel requested to go last (the position that would be awarded a secret game power).[106]

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