Episode 7
John Humphrys presents the celebrity version of Britain's toughest quiz. Four more celebrities take on the Mastermind challenge as comedian Hal Cruttenden, actress Clare Perkins, Olympic gold medal-winning rower Sophie Hosking and Radio 1 DJ Huw Stephens answer questions on the Rocky films, Cormac McCarthy's Border Trilogy, the London Underground and Johnny Cash.
Other episodes for this season
