While attending a Swiss school for diplomats' daughters, the teenage daughter of the American ambassador uses her access to various embassies to engage in espionage.
Unfortunately the movie 13 Frightened Girls is not yet available on HBO Max.
| Directing | William Castle | Director |
| Writing | Otis L. Guernsey Jr. | Story |
| Writing | Robert Dillon | Screenplay |
| Production | William Castle | Producer |
| Production | Dona Holloway | Associate Producer |
| Sound | Van Alexander | Original Music Composer |
| Camera | Gordon Avil | Director of Photography |
| Editing | Edwin H. Bryant | Editor |
| Art | Don Ament | Art Direction |
| Art | William Kiernan | Set Decoration |
| Costume & Make-Up | Lanz | Costume Design |
| Costume & Make-Up | Ben Lane | Makeup Supervisor |
