QI returns with Series W, promising another round of razor-sharp wit, unexpected facts and the very best in comedy talent.

At the helm once again is Sandi Toksvig, joined by Alan Davies as they both lead a dazzling mix of first-time guests and returning favourites who wrestle with the Weird and Wonderful, dabble in Wordmongery, puzzle over Who, What, Why and unravel all manner of Whatnots.