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Monogram's Sea Tiger stars John Archer as discredited sea captain Ben McGrun, on the outs for supposedly collaborating with the enemy during the war. Blackballed in the U.S., Ben manages to dig up a job in New Guinea as skipper of a rundown freighter owned by heroine Jenine (Marguerite Chapman). It turns out that Ben and Jenine are the only honest people in the region, leading to trouble aplenty when a gang of gem thieves arrive on the scene. Seizing the opportunity to redeem himself, Ben risks life and limb to round up the crooks. There seems to be two stories going on at once, leading at least one observer to conclude that Sea Tiger was originally conceived as the pilot for a TV series.