S12, E9: Rob Brydon, Lee Mack and David Mitchell return for an episode of previously unseen material. Guests include Jo Brand, Emma Bunton, Olivia Colman, Daisy May Cooper, Stacey Dooley, Dion Dublin, Alex Jones, Debbie McGee, Aston Merrygold, Diane Morgan, Bob Mortimer, Richard Osman, Rachel Parris, Jonnie Peacock, Lucy Porter, Rory Reid, Jon Richardson, Michaela Strachan, Henning Wehn and Shaun Williamson.