Ericson
Lockhart
Morell
Ferraby
Bennett
Watts
Yeoman Wells
Tallow
Baker
Raikes
Polish Captain
Gracey
Phillips
Julie Hallam
Tallow's Sister
Doris Ferraby
Elaine Morell
Tonbridge
Wainwright
Signalman Rose
Sellars
Carslake
Gray
Broughton
Norwegian Captain
French Captain
Scott Brown
Allingham
ASDIC Operator
Admiral at Party
R.N. Lieutenant
R.N. Captain
Lieutenant-Commander
The Waiter
A Survivor
A.R.P. Warden
Petty Officer Instructor
Warden (uncredited)
Sonar Operator (uncredited)
Sailor (uncredited)
Sailor in Water
Admiral Murray-Forbes (uncredited)