David Tennant

The Doctor

Kylie Minogue

Astrid Peth

Russell Tovey

Midshipman Alonso Frame

Jimmy Vee

Bannakaffalatta

Clive Swift

Mr. Copper

George Costigan

Max Capricorn

Geoffrey Palmer

Captain Hardaker

Debbie Chazen

Foon Van Hoff

Clive Rowe

Morvin Van Hoff

Andrew Havill

Chief Steward

Bernard Cribbins

Wilfred Mott

Paul Kasey

The Host

Jason Mohammad

Newsreader

Jessica Martin

The Queen (voice)

Johnathon Farrell

Ship's Officer (uncredited)