Plot: Rob Brydon, Lee Mack and David Mitchell return for another episode of previously unseen material from Series 16, featuring Motsi Mabuse, Bez, Sarah Greene, Joe Wilkinson, Snoochie Shy, Lucy Martin, Anton Du Beke, Jo Brand, Steve Pemberton, Shazia Mirza, Lucy Beaumont, Tom Allen, Amol Rajan, Bob Mortimer, Professor Alice Roberts and Morgana Robinson.