Alexander Armstrong and co-host Richard Osman present a special celebrity Doctor Who edition of the quiz that tests the depths of your general knowledge, as guests from the world of Doctor Who try to come up with the answers that nobody else could think of.

Featuring Bernard Cribbins and Jacqueline King, Andrew Hayden-Smith and Nicola Bryant, Sylvester McCoy and Sophie Aldred, and Louise Jameson and Frazer Hines.