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 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
- Diana Beevers WRNS Officer (uncredited)
-
Paul Hansard
Cmdr. Steiner (uncredited)
- Luke Hanson German Lieutenant (uncredited)
- Desmond Jordan Naval Doctor (uncredited)
- Dennis Mayers Sub-Lieutenant on X-1 (uncredited)
- Doug Robinson Seaman in Self-defence Demonstration (uncredited)
-
George Roubicek
Redmayne's Flag Officer (uncredited)
- Richard Steele Captain in Redmayne's Office (uncredited)