Top Cast
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
Steve Kirby
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
Keith Alexander
Sub. Lt. X-3
Diana Beevers
Diana Beevers
WRNS Officer (uncredited)
Paul Hansard
Cmdr. Steiner (uncredited)
Luke Hanson
Luke Hanson
German Lieutenant (uncredited)
Desmond Jordan
Desmond Jordan
Naval Doctor (uncredited)
Dennis Mayers
Dennis Mayers
Sub-Lieutenant on X-1 (uncredited)
Doug Robinson
Doug Robinson
Seaman in Self-defence Demonstration (uncredited)
