Josh attempts babysitting his new sister and charming his new housemate. As his house fills with semi-clothed twentysomethings and drunk, wary parents, Mum arrives with a sobering surprise.

Tom meets a cute girl, Josh meets an odd boy, and a beer pong game gets really weird at a party. Mum is admitted to a psych hospital; Josh meets her fellow patients and feels strangely at home.

Geoffrey calls Josh and they go on a date; Arnold books himself into the same mental home as Mum; Dad and Mae have their first baby panic moment; Jenny discovers Tom is still having sex with Niamh.

Claire declares she's coming home; Niamh finds out about Jenny; Patrick and Josh get stuck in a traffic jam; Patrick kisses Josh; Tom presents Jenny with a baby rabbit; Mum is distraught to discover that Stuart has a wife.

Claire stays with Tom, Josh and Patrick; Josh asks Dad for money to pay the plumber; a cleaner catches Josh graffitiing a toilet wall; Mum and Ginger have a fight; the housemates go to see Jenny in a school production.

Patrick tells Josh he's not sexually interested in him; Josh agrees to take Mum and her friends to the zoo; Tom and Jenny have a weird rabbit funeral and break up; Arnold kisses Josh.

Mum and Josh go hiking in scenic remote Tasmania; Mum gets trapped in a waterhole by a snake.

Patrick moves out of the house; Tom eats all of Josh's special truffled mac and cheese.

Josh's first day on the job at his coffee cart; Stuart tells Mum he's leaving.

Josh and Arnold go out dancing and bump into a very out-of-it Patrick; Arnold has an anxiety attack.

Josh is surprised to find he's living in a romcom; Josh till can't seem to win Arnold over.

Josh, Tom, Arnold and Claire discuss Arnold's plan to come out to his parents at his birthday party; Mae and Dad have their biggest fight yet; Mum and Hannah have a big night out.

Josh, Tom and Hannah finally get to meet Arnold's parents; Arnold makes his big coming out announcement.

Josh, Tom and Arnold have a night to remember as they experiment with drugs, head to a nightclub, meet the intriguing Ella and end up spending a surprising night in hospital.

As the boys recover from their big night, Claire arrives home from Berlin; Josh finally admits that his pet chicken is a rooster.

Tom and Ella make a nervous trip to the dentist; Josh and Claire have to deal with a decision that makes them realize they're growing up fast; Mum plots revenge when she learns Stuart is still seeing his wife.

While Arnold is away at a maths summit, Josh takes advantage of his new open relationship status by hooking up with a stranger; Tom challenges Josh and Claire to smash his piñata.

Josh agrees to visit Ben in hospital before his brain surgery, but keeps it a secret from Arnold; Tom discovers he has chlamydia and goes to ridiculous lengths to try and treat Ella without losing her.

As Josh waits to hear if Ben survives his surgery, Josh, Tom, Claire, Ella and Arnold find themselves stuck in the cabin of a giant observation wheel.

Christmas orphans Tom, Arnold, Ella, Claire and Hannah crowd around the table with Josh's family for a festive lunch.