Cmdr. Richard Bolton, RNVR

James Caan

Acting

Lt. Davies R.N.V.R

David Sumner

Acting

Sub-Lt. Pennington, RN

Norman Bowler

Acting

Leading Seaman Quentin

Paul Young

Acting

CPO Barquist X 3

Brian Grellis

Acting

Lt. Robert Talbot Gogan R.N.R.

William Dysart

Acting

Sub-Lt. Keith Willis, RNVR

John Kelland

Acting

CPO Boker Knowles

Kenneth Farrington

Acting

CPO Norman Kennedy

Carl Rigg

Acting

Leading Seaman X-2

Steve Kirby

Acting

Leading Seaman X-1

Nick Tate

Acting

Capt. Erlich of the 'Lindendorf'

George Pravda

Acting

Vice Admiral Redmayne (uncredited)

Rupert Davies

Acting

Sub. Lt. X-3

Keith Alexander

Acting

WRNS Officer (uncredited)

Diana Beevers

Acting

Cmdr. Steiner (uncredited)

Paul Hansard

Acting

German Lieutenant (uncredited)

Luke Hanson

Acting

Naval Doctor (uncredited)

Desmond Jordan

Acting

Sub-Lieutenant on X-1 (uncredited)

Dennis Mayers

Acting

Seaman in Self-defence Demonstration (uncredited)

Doug Robinson

Acting

Redmayne's Flag Officer (uncredited)

George Roubicek

Acting

Captain in Redmayne's Office (uncredited)

Richard Steele

Acting