Five series champions - Josh Widdicombe, Katherine Ryan, Noel Fielding, Rob Beckett and Bob Mortimer - clash, as we find out their most embarrassing items.
Five hall of famers return for more consensual indignity at the hands of Greg Davies. The challenges include making a mask which both looks and tastes great.
Series winners Ed Gamble, Kerry Godliman, Liza Tarbuck, Lou Sanders and Richard Herring bid to become the next Champion of Champions with bath toys, bobbins and bananas.
Former champs Dara Ó Briain, Morgana Robinson, Sarah Kendall and Sophie Duker - and former runner-up Kiell Smith-Bynoe - battle for Greg Davies' buff body forged in gold.
