Mathew Baynton Thomas Creator, Actor, Writer, Executive Producer Simon Farnaby Julian Creator, Actor, Executive Producer Martha Howe-Douglas Fanny Creator, Actor, Executive Producer Jim Howick Pat Creator, Actor, Writer, Executive Producer Laurence Rickard Robin the Caveman , Headless Humphrey's Head Creator, Actor, Executive Producer Ben Willbond Captain Creator, Actor, Executive Producer Lolly Adefope Kitty Actor Charlotte Ritchie Alison Actor Kiell Smith-Bynoe Mike Actor Sophie Bould Carol Actor Billy Byers Young Daley Actor Lauren Douglin Andi Actor Charlie Mackinnon Young Daley Actor Oliver Maltman Alexander Actor Simon Hynd Director Pat Tookey-Dickson Producer