On screen
Cast
22 credited performers
James Caan
Cmdr. Richard Bolton, RNVR
David Sumner
Lt. Davies R.N.V.R
Norman Bowler
Sub-Lt. Pennington, RN
Paul Young
Leading Seaman Quentin
Brian Grellis
CPO Barquist X 3
William Dysart
Lt. Robert Talbot Gogan R.N.R.
John Kelland
Sub-Lt. Keith Willis, RNVR
Kenneth Farrington
CPO Boker Knowles
Carl Rigg
CPO Norman Kennedy
Artwork unavailable
Steve Kirby
Leading Seaman X-2
Nick Tate
Leading Seaman X-1
George Pravda
Capt. Erlich of the 'Lindendorf'
Rupert Davies
Vice Admiral Redmayne (uncredited)
Keith Alexander
Sub. Lt. X-3
Artwork unavailable
Diana Beevers
WRNS Officer (uncredited)
Paul Hansard
Cmdr. Steiner (uncredited)
Artwork unavailable
Luke Hanson
German Lieutenant (uncredited)
Artwork unavailable
Desmond Jordan
Naval Doctor (uncredited)
Artwork unavailable
Dennis Mayers
Sub-Lieutenant on X-1 (uncredited)
Artwork unavailable
Doug Robinson
Seaman in Self-defence Demonstration (uncredited)
George Roubicek
Redmayne's Flag Officer (uncredited)
Artwork unavailable
Richard Steele
Captain in Redmayne's Office (uncredited)