Determined to be head girl, Martha goes head to head with best friend Lily. Meanwhile, Ollie has a terrible dilemma to resolve.

Kat’s plan to outdo Martha backfires, while Jas and Lily help Martha and Ollie spend time apart to deal with their suppressed feelings for one another.

Jas and Lily plan to go travelling together but soon discover that they don’t share the same idea of a perfect holiday. Lily asks Martha and Ollie to help persuade Jas to back out.

Martha and Ollie face off in a legal battle to win custody of Edison, a cuddly lightbulb. Unfortunately Lily and Rufus are hopeless as their lawyers, and Kat is the presiding judge.

Lily tries to convince her friends that she is a top model, Martha gets a job in Mugshotsz and Ollie tries to be cool like Sid.

Lily’s new boyfriend Bob is so like Rob that Martha and Ollie use science to prove Lily is not over Rob, which leads to a shocking discovery. Meanwhile, Mr Malone offers terrible advice to Jas.

Lily and Martha compete to be best friends with exchange student Kesia. Meanwhile, Ollie has to write his student thesis from memory and Mr Malone tries to write a novel.

Lily’s friends are all coupled up and keep leaving her out, so she sets about trying to break up the happy couples. Meanwhile, Kat tries to teach Jas to be ruthless.

Martha and Kat use maths to create a dance track and become overnight pop stars, but they argue over their second tune. Lily gets competitive. Sid gets writer’s block.

Nothing to see here, just another normal day at Cranmede: Sid has a crisis about getting his head shaved, Jas learns to ride a boiled egg and Mr Malone betrays ThunderBun.

Martha thinks Lily might win the Hastings Prize, so tries to distract Lily by finding her a boyfriend. Meanwhile, Lily thinks Martha wants a boyfriend and decides to help her find one.

Lily is really excited about the prom, but none of her friends want to go, including Martha – which is awkward as Ollie was going to ask her out after the head pupils’ first dance.