Chat show host Jonathan Ross, world super-middleweight boxing champion Carl Froch and actress Samantha Womack, best known as EastEnders' Ronnie Mitchell, use knowledge, skill and tactics to win turns on the arcade-style token-pushing machine. Dropping counters down a choice of four chutes, the star contestants hope to knock piles of them off a moving shelf - and the more they collect, the better their chances of scooping a £20,000 prize for a charity of their choice.