Immediate delivery recounts the misadventures of Feliciano Callosum (Cantinflas), a postman who is recruited by the secret counterintelligence service (called XU-777 secret agency), and must uncover an international conspiracy.
| Directing | Miguel M. Delgado | Director |
| Production | Jacques Gelman | Producer |
| Editing | Jorge Busto | Editor |
| Camera | Gabriel Figueroa | Director of Photography |
| Crew | Luis Fernández | Sound Recordist |
| Camera | Ángel Corona | Still Photographer |
| Writing | Miguel M. Delgado | Writer |
| Sound | Galdino R. Samperio | Sound Re-Recording Mixer |
| Crew | Antonio Muñoz Ravelo | Special Effects |
| Costume & Make-Up | María de Jesús Lepe | Hairstylist |
| Crew | Carlos León | Additional Dialogue |
| Directing | Moises M. Delgado | Assistant Director |
| Art | Roberto Silva | Production Design |
| Directing | Luis Gaytán | Script Supervisor |
| Sound | James L. Fields | Sound |
| Production | Fidel Pizarro | Production Manager |
| Sound | Gustavo César Carrión | Original Music Composer |
| Sound | Raúl Portillo | Sound Editor |
| Writing | Jaime Salvador | Adaptation |
| Costume & Make-Up | Ana Guerrero | Makeup Artist |
