Mathew Baynton Thomas Creator, Actor Simon Farnaby Julian Creator, Actor, Writer, Executive Producer Martha Howe-Douglas Fanny Creator, Actor, Executive Producer Jim Howick Pat Creator, Actor Laurence Rickard Robin the Caveman , Headless Humphrey's Head Creator, Actor Ben Willbond Captain Creator, Actor, Writer Charlotte Ritchie Alison Actor Kiell Smith-Bynoe Mike Actor Lolly Adefope Kitty Actor Katy Wix Mary Actor Tom Kingsley Director Matthew Mulot Producer Alison Carpenter Executive Producer Imogen Cooper Executive Producer Debra Hayward Executive Producer