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...
Boris Karloff | Mr. James Lee Wong |
Marjorie Reynolds | Roberta 'Bobbie' Logan |
Grant Withers | Police Capt. Bill Street |
Huntley Gordon | Mr. Davidson |
George Lynn | Capt. Guy Jackson |
William Royle | Capt. Jaime |
James Flavin | Police Sgt. Jerry |
Lotus Long | Princess Lin Hwa |
Lee Tung Foo | Willie |
Bessie Loo | Lilly May |
Ernie Stanton | Burton |
I. Stanford Jolley | Palisser Hotel Clerk |