after a month's leave, discovers what has happened between Caroline and Guy, and although hurt, makes no attempt to interfere. Guy, on learning of Mac's terminal illness, tells Caroline to marry Mac instead of him. Meanwhile, Alan and Joanna are still on the run, having abandoned Martin. Whilst on their journey, they accidentally kill three more people, a mechanic, a shop assistant and a policeman. Soon, they decide that, with no transport, money or employment, the only option is suicide. They are last seen, naked, walking hand-in-hand towards the sea. Meanwhile, Karen returns to work after her fall, but has changed drastically. She has become more confident and has developed better dress sense. Boyce ends up missing Alan, after finding that his replacement will not tolerate any misbehaviour. With Joanna gone, the office girls start to run riot. They form their own tribe and become hostile to anyone who enters the department. Mac and Caroline finally marry, despite Mac's terminal illness (the exact nature of which is never disclosed, although Mac does tell Guy that its name has an "a" and an "e" in it). Sue gets over her obsession with Mac and finds love with a new man, who reciprocates her feelings. The episode concludes with Caroline being carried into the air by a mass of helium filled balloons at the wedding reception. The DVD box set extras include an alternative ending where Guy and Mac grab onto Caroline's ankles and are taken to the sky with her; this alternative ending ends with Mac saying, "Caroline, there's something I've been meaning to tell you." Cast Main characters Mark Heap – Alan Statham Tamsin Greig – Caroline Todd Sarah Alexander – Angela Hunter Sally Bretton – Kim Alabaster Oliver Chris – Boyce Olivia Colman – Harriet Schulenburg Michelle Gomez – Sue White Pippa Haywood – Joanna Clore Katie Lyons – Naughty Rachel Stephen Mangan – Guy Secretan Lucinda Raikes – Karen Ball Julian Rhind-Tutt – "Mac" Macartney Karl Theobald – Martin Dear Recurring characters Darren Boyd – Jake Leaf Keir Charles – Oliver Daisy Haggard – Emmy Paterson Joseph – Lyndon Jones Sally Phillips – Holly Hawkes Critical reaction The show received generally very positive reviews. The Evening Standard said that it was "a comedy as physically adroit as it was verbally sharp", and The Guardian said that "Channel 4’s hospital sitcom is the most innovative comedy since, well, The