| Gastón Santos | ... | Gastón | |
| Rayo de Plata | ... | Gastón's Horse | |
| Manola Saavedra | ... | Julieta | |
| Pedro de Aguillón | ... | Espergencio (as Pedro d'Aguillón) | |
| Manuel Dondé | ... | Don Nacho Mendoza | |
| Sara Cabrera | ... | María | |
| Salvador Godínez | ... | Dr. Morales | |
| Lupe Carriles | ... | Carmela | |
| rest of cast listed alphabetically: | |||
| Arturo Corona | ... | (uncredited) | |
| José Dupeyrón | ... | Villano (uncredited) | |
| Moonlight | ... | (uncredited) | |
| Hernán Vera | ... | Cantinero (uncredited) | |
| Gabriel Álvarez | ... | (uncredited) | |
Directed by | |||
| Rafael Baledón | |||
Writing credits | ||
| Ramón Obón | (story) | |
| Ramón Obón | (adaptation) | |
Produced by | |||
| Alfredo Ripstein hijo | .... | producer (as Alfredo Ripstein Jr.) | |
Original Music by | |||
| Gustavo César Carrión | (as Gustavo C. Carrión) | ||
Cinematography by | |||
| Raúl Martínez Solares | |||
Film Editing by | |||
| Juan José Marino | |||
Casting by | |||
| Guillermo Castillo | |||
Set Decoration by | |||
| Manuel Ladrón de Guevara | (as Manuel L. Guevara) | ||
Makeup Department | |||
| Esperanza Gómez | .... | hair stylist | |
| Concepción Zamora | .... | makeup artist | |
Production Management | |||
| José Alcalde | .... | unit manager | |
| Armando Solís | .... | assistant unit manager | |
| Carlos Ventimilla | .... | production manager | |
Second Unit Director or Assistant Director | |||
| Jesús Marín | .... | assistant director (as Jesús Marín Jr.) | |
Sound Department | |||
| James L. Fields | .... | sound supervisor | |
| Galdino R. Samperio | .... | sound re-recording mixer (as Galdino Samperio) | |
| Rodolfo Solís | .... | dialogue recordist | |
Special Effects by | |||
| Jorge Benavides | .... | special effects (as 'Benavides') | |
Camera and Electrical Department | |||
| Carlos Nájera | .... | lighting | |
| Cirilo Rodríguez | .... | camera operator | |
Costume and Wardrobe Department | |||
| Julio Chávez | .... | wardrobe | |
| Consuelo Múgica | .... | wardrobe supervisor | |
Editorial Department | |||
| José A. Calvo | .... | assistant editor | |
| Francisco Gómez | .... | color technician | |
Music Department | |||
| Gustavo César Carrión | .... | musical director (as Gustavo C. Carrión) | |
| Galdino R. Samperio | .... | music recordist (as Galdino Samperio) | |
Other crew | |||
| Nicolás Rueda hijo | .... | titles (as Nicolás Rueda Jr.) | |
| 'Chema' Hernandez | .... | head wrangler (uncredited) | |
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| Curse of the Devil | The Order | Les vampires | Stir of Echoes | Like Minds |
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| Full cast and crew | Company credits | External reviews |
| IMDb Mystery section | IMDb Mexico section |
Well, this was an unimaginably huge disappointment, and I'm really not used to be disappointed by a 50's Mexican horror production, especially not when the man in the director's chair is the same genius (?) responsible for one of the greatest Gothic masterpieces ever made, namely "The Curse of the Crying Woman". "Swamp of the Lost Monster" is an odd and lackluster hodgepodge of styles and genres and, despite its short running time, it's an incredibly boring effort. Horror and western story lines are already hard to combine as it is, and when the film then also tries to add in a mystery sub plot and some comical relief characters, it rapidly becomes a failure beyond imaginable proportions. The primary storyline centers on a laughably ridicule monster (some kind of hybrid between the "Creature from the Black Lagoon" and the aborted offspring of "Octaman") dragging people into a swamp and killing them. The dork in his stupid rubber suit first appeared when the corpse of a local eminent villager vanished from its coffin before the burial, yet nobody (not even the cowboy-detective or his assistant) seems to notice the link. There's another totally implausible sub plot about an old blind hag fooling the entire town into thinking she can see and a glorious, almost Academy-Award worthy role for the endlessly prancing horse. Too bad about the atmospheric filming locations and the occasional glimpses of decent photography, but the film is a total dud.