Vincent Price stars in this early '60s adaptation of Thomas De Quincey's thriller about an opium addict trying to solve a mystery in San Francisco's Chinatown.
| Actor | Role |
|---|---|
 Vincent PriceGilbert De Quincey | Gilbert De Quincey |
| LLinda HoRuby Low | Ruby Low |
 Richard LooGeorge Wah | George Wah |
| JJune Kyoto LuLotus | Lotus |
 Philip AhnChing Foon | Ching Foon |
 Yvonne MoraySing-song girl | Sing-song girl |
 Terence de MarneyScrawny man | Scrawny man |
 John FujiokaAuctioneer | Auctioneer |
 Angelo RossittoNewspaper Boy | Newspaper Boy |
 Victor Sen YungWing Young | Wing Young |
| GGeri HooSecond Dancing Girl | Second Dancing Girl |
| GGerald JannFat Chinese | Fat Chinese |
| VVivianne MankuCatatonic Girl | Catatonic Girl |
| MMiel SaanLook Gow | Look Gow |
| NNobuko MiyamotoFirst Dancing Girl | First Dancing Girl |
| AAlicia LiPing Toy | Ping Toy |
 Ralph AhnWah Chan | Wah Chan |
| CCaroline BarrettLo Tsen | Lo Tsen |