Coolio, Jenny Eclair, Matthew Wolfenden

Ben Shephard invites US rapper Coolio, comedienne Jenny Eclair and Emmerdale star Matthew Wolfenden (David Metcalfe) to take part in the quiz show, in which contestants answer questions to win turns on an arcade-style machine. Dropping tokens down a choice of four chutes, they hope to knock piles of them off a moving shelf - and the more they gather, the better their chances of collecting the £20,000 prize for their selected charity.