Mathew Baynton Thomas Creator, Actor, Executive Producer Simon Farnaby Julian Creator, Actor, Executive Producer Martha Howe-Douglas Fanny Creator, Actor, Executive Producer, Writer Jim Howick Creator Charlotte Ritchie Alison Actor Kiell Smith-Bynoe Mike Actor Jim Howick Pat Actor, Executive Producer Laurence Rickard Robin the Caveman , Headless Humphrey's Head Actor, Executive Producer, Writer Lolly Adefope Kitty Actor Ben Willbond Captain Actor, Executive Producer Katy Wix Mary Actor Mario Demetriou Mini Cab Controller Actor Aqib Khan Nev Actor Geoffrey McGivern Barclay Actor Anya McKenna-Bruce Jemima Actor David Schaal Vinny Actor Tom Kingsley Director Matthew Mulot Producer Alison Carpenter Executive Producer Imogen Cooper Executive Producer Debra Hayward Executive Producer Alison Owen Executive Producer