Quiz master Chris Moyles returns to host a brand new, fifth series of Quiz Night... on a Wednesday. Why not. A fresh assortment of celebrities from the UK and America join Chris this time around, showing off their general knowledge with the aim of claiming the top spot on the illustrious leader board and avoiding singing out the show. This series sees exciting new rounds and challenges, including a giant, specially built keyboard game. Also joining Chris during the series are (people with something to promote, like) Tulisa Contostavlos, John Bishop, Frank Skinner, Amir Khan, Gok Wan, Pixie Lott and Alesha Dixon. In the studio this week, Jeremy Clarkson, Katherine Jenkins and Jason Manford battle it out, and there are appearances from Britney Spears and Robbie Williams.