It's pudding week and the signature challenge is a steamed favourite. There's a technical challenge where timing is everything and a multi-layered showstopper that's not to be trifled with. Which bakers will impress Prue Leith and Paul Hollywood enough to keep their place in the tent? And which of the eight remaining bakers will be heading home? Noel Fielding and Sandi Toksvig are with the contestants every step of the way, and during a break from the action, Sandi returns to her old haunt, Cambridge University, to discover the history of the college pudding.