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, Executive Producer Charlotte Ritchie Alison Actor Kiell Smith-Bynoe Mike Actor Lolly Adefope Kitty Actor Ben Willbond Captain Actor, Writer Katy Wix Mary Actor Laurence Rickard Robin , Humphrey's Head Actor Nick Collett Director Matthew Mulot Producer Alison Carpenter Executive Producer