A pretty Chinese woman, seeking help from San Francisco detective James Lee Wong, is killed by a poisoned dart in his front hall, having time only to scrawl "Captain J" on a sheet of paper. She proves to be Princess Lin Hwa, on a secret military mission for Chinese forces fighting the Japanese invasion. Mr. Wong finds two captains with the intial J in the case, neither being quite what he seems; there's fog on the waterfront and someone still has that poison-dart gun...
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CAST
Boris Karloff
Mr. James Lee Wong
Marjorie Reynolds
Roberta 'Bobbie' Logan
Grant Withers
Police Capt. Bill Street
Huntley Gordon
Mr. Davidson
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