David Tennant

as The Doctor

Kylie Minogue

as Astrid Peth

Russell Tovey

as Midshipman Alonso Frame

Jimmy Vee

as Bannakaffalatta

Clive Swift

as Mr. Copper

George Costigan

as Max Capricorn

Geoffrey Palmer

as Captain Hardaker

Gray O'Brien

as Rickston Slade

Debbie Chazen

as Foon Van Hoff

Clive Rowe

as Morvin Van Hoff

Andrew Havill

as Chief Steward

Bernard Cribbins

as Wilfred Mott

Paul Kasey

as The Host

Bruce Lawrence

as Engineer

Stefan Davis

as Kitchen Hand

Jason Mohammad

as Newsreader

Jessica Martin

as The Queen (voice)

Johnathon Farrell

as Ship's Officer (uncredited)