Liam's curiosity gets the better of him when a next door neighbour entrusts him with his house keys. Having sworn to Caroline that he wouldn't, Liam goes in for a snoop, promptly falling over and injuring his neck. He decides to pretend that it was an accident at work, rather than tell Caroline the truth, but his web of lies quickly gets him in trouble. Meanwhile Jim is haunted by a dark secret. And Kevin starts a new business - extra maths tutorials for Chloe's classmates. But does he know anything about maths that isn't related to gambling?