Based on Ladislas Fodor's "Stranger on the Stairs". A loved triangle composed by a cynical entrepreneur, a loan manager, and a seductive secretary will lead to a criminal plot in Cuba.
| Directing | Tulio Demicheli | Director |
| Writing | Ladislas Fodor | Novel |
| Writing | Tulio Demicheli | Writer |
| Production | Gregorio Walerstein | Producer |
| Editing | Rafael Ceballos | Editor |
| Camera | Jack Draper | Director of Photography |
| Sound | Antonio Díaz Conde | Original Music Composer |
| Art | Luis Moya | Production Design |
| Production | Paul Castelain | Production Manager |
| Production | Juan J. Ortega | Production Manager |
| Directing | Rosalino S. de Trigo | Assistant Director |