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: Bayfield is best known for his rugby union exploits. He played lock forward for Northampton Saints and Bedford Blues. He also played 31 times for England and three times for the British and Irish Lions. He was part of England's 1992 Five Nations Grand Slam winning side. He was forced to retire from the game in 1998 after sustaining a neck injury in training. Since retiring, he has moved into broadcasting. He has presented coverage of the NFL, World's Strongest Man and the Rugby World Cup. More recently, he began presenting BT Sport's rugby coverage. Since 2012, he has co-presented Crimewatch.

Career: Dawson's career as a scrum-half took off when he was selected to play for England in 1995. During his time with the squad, he was a member of the victorious 1997 British Lions tour, captained the English national side in 2000 and was a member of the team that won the World Cup in 2003. A year later, he left Northampton and moved to London Wasps. In 2006, he announced his retirement from the sport. Two years earlier he had begun his assault on TV, joining the long-running quiz A Question of Sport as a team captain. The year he gave up rugby saw him take part in cookery show Celebrity MasterChef, which he won, and Strictly Come Dancing, where he was beaten into second place by Mark Ramprakash. More recently, he has presented Monster Munchies for the Good Food channel and Real Food Family Cook Off on Channel 5.

Career: Gorman followed up his breakthrough success with other similarly zany projects. His astrology experiment saw him living his life entirely at the whim of his horoscopes, while his googlewhack adventure saw him travelling the world to meet people whose websites possessed the mysterious "googlewhack" - returning just one search result on the website Google. In 2003, he was listed as one of the 50 funniest comedy acts in The Observer, and he is a regular performer on Radio 4. He also regularly appeared on the BBC Three show Rob Brydon's Annually Retentive, and presents a TV version of his own radio show, Genius. He continues to tour as a stand-up comic.