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.

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

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