Comedian Josh Widdicombe, athlete-turned-commentator Katharine Merry, Emmerdale actress Sian Reese-Williams and wildlife presenter Nick Baker take on the Mastermind chair answering questions on Blur, Aston Villa, the sitcom Black Books and Alfred Russel Wallace.

Four more celebrities take on the Mastermind challenge as the poet John Cooper Clarke, Ben Faulks from CBeebies' Mr Bloom's Nursery, the entertainer Roy Hudd and the singer-songwriter Frank Turner answer questions on the films of Elvis Presley, Sir Ernest Shackleton's Trans-Antarctic expedition, the music hall star Dan Leno and Iron Maiden.