Cave of the Living Dead

An American inspector sent by Interpol to solve a string of murders in a secluded Balkan village. He discovers the killings coincide with power outages and that the corpses disappear after each crime. Despite disguising himself as a tourist, the village quickly learns he is an Interpol agent, complicating his work. During the investigation he falls in love with Karin Schumann, further entwining personal and professional stakes.

A cultured, enigmatic nobleman living in a high castle who is said to conduct blood studies. The villagers fear him, but Doren uncovers his true role as the vampire behind the murders. He commands a loyal assistant and maintains a cultivated, cold demeanor.

Young, pretty assistant to von Adelsberg; She becomes a focal point for Doren, and the two fall in love. Her loyalty to Adelsberg and her own safety are at stake as the vampire plot unfolds. She ultimately helps reveal the vampire's coffin with Doren's help.

Adelsberg's black servant, loyal to his master. He assists in the investigation, aiding the group in locating the vampire's coffin in the cave beneath the castle.

Maria is the inn's cook and a key victim in the killer's pattern. She dies during the power outage, triggering Doren's investigation.

The village doctor, whose post-mortem explanations stubbornly point to heart failure. He remains suspicious of the events and offers a skeptical counterpoint to the night's crimes.

The deaf, dumb villager Thomas is known for nocturnal behavior that arouses superstition in the village, adding to the eerie atmosphere surrounding the grotto.

The innkeeper who tries to force himself on Maria the night before the last murder, illustrating the seedier side of village life and the danger in close quarters.

An old fortune teller babbles about alleged vampires roaming the area, reinforcing village superstition and fear.