- Country: Mexico
- Genres: Fantasy, Horror, Mystery
- Release:
- Director: Fernando Méndez
- Writers: Ramón Obón
- Language: Spanish
- Stars: Gastón Santos , Rafael Bertrand , Mapita Cortés , Carlos Ancira , Carolina Barret , Luis Aragón , Beatriz Aguirre , Antonio Raxel , J. Portillo , Abel Salazar
- Runtime: 71 min
- Awards: N/A
- AKA: Misterios de ultratumba (Mexico) , Der Tote kehrt zurück , Mysteries of the Afterlife , Mistérios de Além-Túmulo (Brazil) , Mysteries from Beyond the Grave (United States of America) , Mysteries from Beyond the Tomb , The Black Pit of Dr. M (Canada) , I misteri dell'oltretomba (Italy) , Misterios de ultratumba , The Black Pit of Dr. M (United States of America) , Mystères d'outre-tombe (France, French Republic)
- Plot: Two doctors make a pact in which they swear that the first to die will return - if possible - to tell the other how to get a glimpse of the afterlife while still alive.
- IMDB:tt0051937
The Black Pit of Dr. M Cast · · · ALL
Fernando Méndez
Director
Gastón Santos
Dr. Eduardo Jiménez
Rafael Bertrand
Dr. Mazali
Mapita Cortés
Patricia Aldama
Carlos Ancira
Elmer, the orderly
Carolina Barret
La Gitana
Beatriz Aguirre
Rosario
Antonio Raxel
Dr. Jacinto Aldama
Luis Aragón
Dr. González
Abel Salazar
José Loza
Amigo de Eduardo en café (uncredited)
Guillermo Álvarez Bianchi
Don Anselmo (uncredited)