

The crew of a submarine is trapped on the sea floor when it sinks. How can they be rescued before they run out of air?

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

Helen Cherry