Apologies for bringing up this old thread, but I have found out the title of the movie I refer to in my first post. It's "Mystery Submarine" starring Edward Judd made in 1963 in black and white. Not a great sub movie by any stretch of the imagination but the bit with the trapped crew member has stuck with me since a kid.
Nemo
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"I'm afraid there is no disguising the fact that King's obsession with the Pacific and the Battle of Washington cost us dear in the Battle of the Atlantic".
Sir John Slessor GCB, DSO, MC, DL
AOC-in-C Coastal Command RAF
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