Lucy persuades Lee to pretend to be gay after she lies to a business acquaintance Guy, who she was told is gay himself, by telling him she lives with a gay flatmate to prove she is not homophobic. However, Guy soon starts to get suspicious and tests Lee's sexuality by taking him to a gay bar. Later, Guy overhears Lee saying to Tim, who had started to think Lee was gay, that he is not gay. When Lucy then explains to Guy what happened, he reveals he is not gay and he and Lucy kiss.

When Guy's daughter Chloe gets appendicitis, Lee and Tim are left looking after her son Dillon while Guy and Lucy visit her. While in their care, Dillon swallows a subbuteo football and Lee and Tim have problems locating it, and try to think of ways to get it out of his body. However, it later turns out Dillon did not swallow it after all. Lucy is worried about the age gap between her and Guy.

As Lucy and Guy's relationship intensifies, Lee starts to ponder his lack of a girlfriend and, encouraged by Barbara, tries speed dating. Tim is forced to go on a disastrous date with Barbara in order to prove that he sees her as more than 'the help'.

Lee's plan to spend time alone with Lucy at Christmas is threatened.

Guy showers Lucy with expensive gifts and whisks her away for a weekend.

Tim decides to sell the flat, so Lee sets to work putting off prospective buyers.

Lucy and Guy are going out with each other, and Guy has practically moved in. This annoys Lee who thinks Guy is too old for her. Lee soon discovers that Guy owns a lap dancing club. While at the club, Lee and Tim see Rose (Thaila Zucchi), a librarian that Tim has been seeing, and discover she is a lapdancer. Tim later dumps her, but then changes his mind. However, Rose refuses to get back together. Meanwhile, Lucy dumps Guy but they soon get back together but agree to take their relationship more slowly.

In an effort to appear as intellectual as Lucy's friends, Lee shows off his 'knowledge' of the art world - holding forth on the subject of an unknown artist, who his cleaner Barbara has told him is the next big thing. When Lucy takes the advice and invests a fortune in the artist's work, Lee is left trying to prevent her from finding out the artist is actually a nobody.