Guest Stars Layton Williams as Stephen Carmichael Charlie Wernham as Mitchell Harper Kae Alexander as Jing Chow Nikki Runeckles as Chantelle Parsons Ethan Lawrence as Joe Poulter Jack Binstead as Rem Dogg Jack Bence as Frank Grayson Harry Enfield as Martin Wickes Weruche Opia as Cleopatra Ofoedo Katherine Kingsley as Mrs Katherine Grayson Roger Allam as Maurice Hewston Archie Lyndhurst as Young Alfie