Eyes Wide Open: Carter joins the Big Brother mentor program, but his visiting Little Brother winds up spending time with Caitlin & an uncomfortable Charlie. The Mayor suffers from insomnia. (S6, E16)

Age Against the Machine: Charlie is exhausted from keeping up with his much-younger girlfriend Tracy. Carter asks Stuart to be his wingman at a gay fundraiser. (S6, E17)

An Affair Not to Remember: Carter pretends to be straight to coach a depressed Paul in the dating game. Charlie and Caitlin have a flashback to their first meeting. (S6, E18)

Let's Give Them Something to Talk About: A therapist helps Caitlin unpack her feelings for her boyfriend Tom & Charlie. Carter helps Paul prepare for an appearance on a phone-in radio show. (S6, E19)

Look Who's Not Talking: Caitlin ends her relationship with Tom & tells Charlie she's interested in dating him. Whilst he's on holiday, Stuart's temporary replacement starts to outshine him. (S6, E20)

A Tale of Four Cities: At a mayors' conference, Caitlin feels awkward because Charlie once had an affair with the organiser, so Caitlin tries to make Charlie jealous. Randall renews his long-standing professional rivalry with Mayor Stone Taylor of Los Angeles (Robert Hays). (S6, E21)

A Friend in Need: Randall tries to please visiting Governor Riley. Charlie and Caitlin struggle to keep their affair secret, and Carter fosters a baby. (S6, E22)