Will Fyffe

as Capt. Ferguson

Leslie Banks

as George Carter

Yvonne Arnaud

as Rosa Pirenti

Phyllis Calvert

as Helen Carter

Hugh McDermott

as Jim Grey

John Salew

as Wilson

Cameron Hall

as Charlie Baxter

Frederick Valk

as Captain Traumer

Anthony Holles

as Chief of Police

Sigurd Lohde

as German Consul

Wally Patch

as Fred

Dennis Wyndham

as Terry

Jack Raine

as Alf

Albert Lieven

as Capt. Grosskraft

Mignon O'Doherty

as Miss Fleming

Yvonne Andre

Eric Clavering

Cot D'Ordan

Noel Dainton

Anton Diffring

as Sailor

Rowland Douglas

Hugh Griffith

as Bit

Frank Henderson

Stuart Latham

Sam Lee

Ernest Metcalfe

John Rae

Charles Rolfe

Gerik Schjelderup

Leonard Sharp

Keith Shepherd

Howard Lang

as German Naval Officer (uncredited)