A scientist experimenting with past lives finds a reincarnated Aztec who can lead him to lost treasure—and to a creature that should remain lost. (Composed of footage from two unrelated Mexican horror films, LA CASA DEL TERROR and LA MOMIA AZTECA, plus new American-made footage.)
| Actor | Role |
|---|---|
 Lon Chaney Jr.The Mummified Werewolf | The Mummified Werewolf |
 Yerye BeiruteProf. Janning | Prof. Janning |
| GGeorge Mitchell AndréDr. Frederick Munson | Dr. Frederick Munson |
| FFred HoffmanDetective Hammond | Detective Hammond |
 Rosita ArenasAnn Taylor (as Rosa Arenas) | Ann Taylor (as Rosa Arenas) |
 Ramón GayDr. Edmund Redding | Dr. Edmund Redding |
 Alfredo Wally BarrónHenchman | Henchman |
| CChuck NilesDouglas Banks | Douglas Banks |
 Steve ConteThe Hired Thief | The Hired Thief |
 Yolanda VarelaWoman In Apartment (as Landa Varle) | Woman In Apartment (as Landa Varle) |
 Germán ValdésMan in Wax Museum | Man in Wax Museum |
 Jorge MondragónOld Scientist | Old Scientist |
 Crox AlvaradoRedding's Aide | Redding's Aide |