Career: Armstrong made his film and TV debuts in 1994 in There's No Business and A Breed of Heroes. He was introduced to Ben Miller in 1996 and their subsequent success at the Edinburgh Festival Fringe led to their first sketch series in 1997; they've worked together a number of times since on various projects. Armstrong played the lead in short-lived sitcom Beast. He has also appeared in Birthday Girl (2001), I Saw You, TLC, Saxondale, Life Begins, The Trial of Tony Blair, Mutual Friends, Woody Allen's Match Point (2005) and Scoop (2006). Armstrong was the voice of supercomputer Mr Smith in The Sarah Jane Adventures, appeared in the 2011 Doctor Who Christmas Special and has presented the BBC game show Pointless since 2009. In recent years, he has also voiced Danger Mouse in the revival of the animated series and presented Rome's Invisible City, Land of the Midnight Sun and Don't Ask Me Ask Britain.

Career: Mangan became a regular on the West End stage, and apart from some foreign adverts, steered clear of TV work for years. He made his film debut in Martha, Meet Frank, Daniel and Laurence in 1998, and had a small role in Billy Elliot. Early TV appearances came in Big Bad World, Sword of Honour, In Defence and Human Remains before his big break as the lead in Adrian Mole: The Cappuccino Years. He's worked consistently in movies and on TV ever since, with roles in Jane Hall, Marple, Never Better, I'm Alan Partridge, Hyperdrive, and the acclaimed Green Wing. His recent work includes Dirk Gently and Episodes on TV, as well as several well-received stage performances.