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: Osman has worked behind the scenes as an executive producer on a number of TV programmes, including Deal or No Deal, 8 Out of 10 Cats, and 10 O'Clock Live. As the UK creative director of TV production company Endemol, he pitched the quiz Pointless to the BBC. As a way of explaining the rules, he played the co-host during a run-through. He was asked to do the role for real when the show was commissioned. Pointless started on BBC Two in 2009 and was an immediate hit. It quickly made the switch to BBC One. Since being in the spotlight on Pointless, he has made guest appearances on QI, Have I Got News for You and Would I Lie to You? He also guest presented an episode of The One Show alongside Alex Jones.

Career: A self-confessed workaholic, her first professional job was as a backing singer for Mari Wilson, which she followed up by appearing in a Squeeze video. She made several minor TV appearances before joining EastEnders in 1988. Since quitting her role as Cindy Beale in the BBC soap she has starred in numerous other major TV shows - including Sunburn (she also released the theme tune as a single), Real Women, Ella and the Mothers, Daylight Robbery, Rock Rivals and Getting Out. She joined the cast of Coronation Street in 2011, playing Stella Price, the landlady of the Rovers Return, but left three years later. She's since appeared in Casualty.

Career: Largely known for her TV appearances, Edney has starred in Inspector Morse, Uncle Silas, Prime Suspect: The Lost Child, The Tenant of Wildfell Hall, A Touch of Frost, Messiah: The Harrowing, New Tricks, Lost Empires and Lewis. She had a lead role alongside Holly Aird in three series of Channel 4 sitcom Dressing for Breakfast. Her other film credits include A Handful of Dust (1988), Mister Johnson (1990), In the Name of the Father (1993), Mesmer (1994) and In Your Dreams (2008). More recently, she played Prudie in BBC drama Poldark.