Jack Whitehall Paul Pennyfeather Actor Tim Pigott-Smith Sniggs Actor Nickolas Grace Prostlethwaite Actor Tom Stourton Alistair Digby-Vaine-Trumpington Actor Matthew Beard Arthur Potts Actor John Woodvine Master of the College Actor Eva Longoria Margot Beste-Chetwynde Actor David Suchet Dr Fagan Actor Douglas Hodge Grimes Actor Stephen Graham Philbrick Actor Vincent Franklin Prendergast Actor Gemma Whelan Diane Fagan Actor Jason Watkins Wilfred Lucas-Dockery Actor Matthew Bird Producer Guillem Morales Director Ben Cavey Executive Producer Will Gould Executive Producer Frith Tiplady Executive Producer James Wood Executive Producer, Screenwriter