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Based on an unpublished novella by John Steinbeck (written on commission expressly to provide treatment material for Hitchcock's screen scenario), Lifeboat found the Master of Suspense navigating a course of maximal tension – in the most minimal of settings – with a consistently inventive, beautifully paced drama that would foreshadow the single-set experiments of Rope and Dial M for Murder.
 
After a Nazi torpedo reduces an ocean liner to wooden splinters and scorched personal effects, the survivors of the attack pull themselves aboard a drifting lifeboat in the hope of eventual rescue. But the motivations of the German submarine captain (played by Walter Slezak) on the eponymous craft might extend beyond mere survival...

With a cast including Shadow of a Doubt veteran Hume Cronyn and the extraordinary, irrepressible Tallulah Bankhead, this 'picture of characters', as François Truffaut aptly termed the film, oscillates dazzlingly between comic repartée and white-knuckle suspense – a perfect example of 'the Hitchcock touch'.