Without adult supervision, the residents of Elm Tree House seize the opportunity to be free and wreak havoc. With Mike enjoying a well-deserved holiday and Gina hospitalized following the recovery of an unexploded grenade, the young people become obstreperous, driving Gus to breaking point. Faith and Elektra act as if they are actual care workers.

When Shannay, the pregnant girlfriend of Lily's dad, Steve, moves into the flat, Lily feels jealous and thus commits rebellious acts. Shannay accidentally breaks the frame of Lily's picture, which is the last straw for Lily, so, with Mike's permission, she temporarily moves back into The Dumping Ground. However, after some reassuring advice from those closest to her, Lily eventually returns to the flat and meets her new half-sibling, Jonah. Meanwhile Tyler and Rick are looking for ways to remove Tyler's tooth.

The Dumping Ground is divided when a same-sex couple show an interest in fostering Gus. As Johnny and Elektra debate about whether gay couples should be allowed to adopt, Gus is in turmoil about leaving the Dumping Ground and father figure Mike behind. But through a series of phases Gus eventually decides to be fostered.

Wicked whispers fly when the police come to see Faith, who will not say why. Meanwhile new girl Floss arrives and wonders where on Earth she has been dumped when Harry informs her of the Dumping Ground's past.

Rick's father, Gerry, turns up for start a fresh start with him. But are Rick and Gerry really ready? Meanwhile, Gina's mum, Hattie, turns up and Tee thinks that Mike wants Hattie in a home.

Absent: Jessie Williams as Lily Kettle

It is the day of the Dumping Ground's annual day out and the Young People decide to be Edwardians for the day. However, the day is not fun when Johnny is in charge and he ruins the day for everyone when he humiliates Elektra making fun of Carmen’s schoolwork and making comments about Lilly and her dad and he accidentally throws food over a painting that gets him and the rest of the gang kicked out and everyone tells him he ruined it for them all.

Mo is the Dumping Ground's new eccentric resident and everyone thinks he is a bit strange. especially Tyler. Tee takes pity on Mo but Mo has not had a real friend before and Tee is soon annoyed with him.

First Appearance: Reece Buttery as Mo Michaels

When a big practical joke on Elektra backfires, Tyler decides it is time that he grew up. Meanwhile, Lily, Carmen and Tee fall out at an unsupervised sleepover at Lily's flat.

A face from the past comes back to haunt Faith and brings danger to the Dumping Ground. And Mo buys a 'magic' egg which unexpectedly hatches into what Johnny and Elektra believe is a venomous snake!