Audio problem: After Tor Johnson drops her, Paula says, "Oh, I'll be alright" but her lips don't move. (01:13:30)
Audio problem: When the hero asks the Coastguard to get him quickly back to London, it is followed by film of a single seat Hawker Sea Hawk jet fighter landing, which sounds just like a piston engined aircraft.
Audio problem: Throughout the movie when they are underground, when someone speaks sometimes you hear an echo and sometimes you don't.