On screen
Cast
20 credited performers
John Mills
Lt. Cmdr. Armstrong
Richard Attenborough
Stoker Snipe
Nigel Patrick
Lt. Manson
George Cole
ERA Marks
Bernard Lee
Cmdr. Gates
Peter Hammond
Sub-Lt. Oakley
Andrew Crawford
Sub-Lt. J. McFee
Michael Brennan
CPO Barlow
Wylie Watson
Character not listed
Helen Cherry
Character not listed
Lana Morris
Character not listed
Victor Maddern
Character not listed
Kenneth More
Character not listed
Zena Marshall
Character not listed
James Hayter
Character not listed
Artwork unavailable
Frank Coburn
Leading Seaman Brough
Roddy McMillan
Leading Seaman Andrews
Jack Stewart
Leading Seaman Kelly
Artwork unavailable
George Thorpe
Capt. Fenton
Alastair Hunter
Capt. Jenner