There have been five series of Taskmaster, each one culminating in the crowning of a worthy champion. Finally, the time has come to put the quintet of comedy goliaths to the definitive test and find out just who is the worthiest of them all. In a two-part super-special past champs Bob Mortimer, Josh Widdicombe, Katherine Ryan, Noel Fielding and Rob Beckett go head-to-head for the ultimate prize in television and life.