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