Michael Craig as Capt. Hugh Dallas

Peter Cushing as Capt. Clive Judd

Bernard Lee as Capt. George Gort

Elizabeth Seal as Charlotte Gort

George Sanders as Sir Arnold Hobbes

André Morell as Capt. Edward Manningham

Gordon Jackson as Capt. Jock Bateson

Charles Tingwell as Capt. Braddock

Noel Willman as Nigel Pickering

Delphi Lawrence as Joyce Mitchell

Marne Maitland as Mr. Robinson

William Abney as First Officer

Jack Hedley as First Officer

Simon Lack as Navigator

Hedger Wallace as Navigator

Charles Mylne as Steward

Howard Pays as Steward

Ballard Berkeley as Commissioner

Charles Lloyd Pack as Commissioner

Homi Bode as Controller

Anthony Newlands as Controller

Geoffrey Bayldon as Aircraft Controller

Ernest Blyth as 2nd Court of Inquiry Member

Olga Dickie as Miss Wright

Victor Harrington as Court of Inquiry Member

Walter Henry as Court of Inquiry Member

Frederick Leister as Sir Henry

Gerald Sim as Operations Room Worker