Following a panic attack, Tony Mammoth decides to get healthy. At the gym, he's confronted by his nemesis and concocts his revenge.

Mammoth forms an intense bromance with a man, Matthew, who Mel starts to date - but Mel isn't feeling it. Meanwhile, Theo turns bad boy.

Mammoth's headteacher, Mr Cowley, is signed off with stress, and Mammoth wants him back. Meanwhile, Mel arranges a big 18th-birthday party for Theo against his wishes.

It's Tony Mammoth's first Christmas since coming back from the dead, and he's determined to make it a special one with his family.