

During WWII, Duke E. Gifford is second in command of the USS Thunderfish, a submarine which is firing off torpedoes that either explode too early or never explode at all. It's a dilemma that he'll eventually take up personally. Even more personal is his quest to win back his ex-wife, a nurse; but he'll have to win her back from a navy flier who also happens to be his commander's little brother.
Acting
Wayne's submarine commander who's somehow more emotional about torpedoes than his ex-wife.
Practical Effects
1951 submarine sets that creak convincingly under studio lighting.

Director
George Waggner
Trivia, insights & behind the scenes
The USS Thunderfish was fictional, but the faulty torpedo crisis was real—American subs had devastating dud rates early in WWII due to defective magnetic exploders.
Wayne made this while avoiding actual military service; his submarine commander role was part of his patriotic image rehabilitation campaign.