The girls follow an app promising future success, but can they resist their weaknesses?

Martha and Ollie are confident they can win the McSherman Science Prize, but they have one tricky formula to work out.

It's Halloween and Jas goes to extreme lengths to cure Lily's many fears before her scary party, while Ollie falls in love with new girl Em.

Lily, Martha and Ollie become prefects and the power goes to their heads.

Lily plans a perfect date night to celebrate her anniversary with Rob, but her mum and Ken might ruin everything.

Lily and Jas fake a falling-out to get Rob and Sid to stop arguing, while Ollie and Martha train Mr Malone to be a better teacher.

Rob enters a modelling competition and Lily is determined he will win using 'the look'. Martha practises dating.

Snobby Ollie mocks Mr Malone's ancestry, inspiring the gang to teach him a lesson. Then Ollie discovers he's actually related to Mr Malone.

Lily's gut instinct tells her that fellow pupil Carla fancies Rob. Rob denies this but Lily sets out to prove her gut instinct is correct.

On the day Martha asks Lily for the 7p she owes her, Lily inherits a lot of money. She becomes determined to prove Martha is petty.

Lily decides to tell Rob she loves him, but first she's going to build him a football stadium out of lollipop sticks.

Ollie, Rob, Jas and Sid enter Battle of the Bands with tuneless Mr Malone. Lily wants her mum's boyfriend Ken to like her.