Dara Ó Briain 12Foot6. In 2013, Ó Briain joined Jack Dee, Chelsee Healey, Greg James, Melanie C and Philips Idowu in "Through Hell and High Water", a Comic Relief challenge which involved British celebrities canoeing the most difficult rapids of the Zambezi River. They raised over £1 million for the charity. "Dara and Ed's Great Big Adventure", a 2015 three-part fly-on-the-wall television series, followed Ó Briain and Ed Byrne on their journey by car down the Pan-American Highway. In June 2015, "Dara Ó Briain Meets Stephen Hawking", in which Ó Briain travels to Cambridge for a series of interviews with theoretical physicist Stephen
Argumental of audience. The programme was originally chaired by journalist John Sergeant whose post-journalistic career at the time the series began was on the rise due in part to his appearance on the BBC's Strictly Come Dancing. He was joined by team captains Marcus Brigstocke, the host of "The Late Edition", and comedian Rufus Hound. Each team captain was accompanied by a guest panellist who have included Jimmy Carr, Sue Perkins, Reginald D. Hunter, Phill Jupitus, Charlie Higson, Johnny Vegas, Lucy Porter, Dara Ó Briain, Sean Lock and Frankie Boyle. From the 2011 series, Sean Lock replaced John Sergeant as presenter,