Guest Stars Lewis Tan as Gaius Chau Dean Charles Chapman as Castor Lance E. Nichols as River King Sophia Di Martino as Lily Co Starring George Sear as Arthur Tamsin Topolski as Wren Bosco Hogan as Ugo Michael Power as Burly Mutineer Robert Fawsitt as Bowler Hat Rebel Ria Murphy as Head Housekeeper Seyi Adewunmi as Guard 1 Tobi Faladé as Dying Bowler Hat Guard
