Steve Gordon, an American agent posing as a black market operator, is in Tangier on a mission to stop the plans of three atomic-scientists who are there to pool their secrets and sell them in a package to the Communists.
| Actor | Role |
|---|---|
 George BrentSteve Gordon | Steve Gordon |
 Mari AldonMillicent | Millicent |
 Dorothy PatrickNadine | Nadine |
 Bert FreedKozad | Kozad |
| DDan SeymourPolice Inspector Rabat | Police Inspector Rabat |
 Alix TaltonOlga | Olga |
 John HarmonTony | Tony |
 Richard KarlanRosnov | Rosnov |
 Shepard MenkenKravich | Kravich |
 Benny RubinBlalu | Blalu |
 Michael RossIvan | Ivan |
 Dayton LummisHenry Morrison | Henry Morrison |
| EEve MarleyNot listed | Not listed |
 Joseph MellNot listed | Not listed |
 Charles WagenheimNot listed | Not listed |