Alphonso DeNoble 's final film.
This film has been marketed under the titles of, "Night of the Zombies", "Gamma 693", "Night of the Wehrmacht Zombies", "Die Nacht Der Zombies", "Sister of Death", "Zombie War Games", and "The Chilling".
The scenes in Munich, Germany were shot without permission.
While filming in St. Peters Church Munich without permission, the team was thrown out by a local priest. After Joel M. Reed falsely claimed that they were shooting for an American TV-Station, permission was granted immediately by the cleric.