Plot
A widow invites thirteen guests to stay at her rural mansion. She reveals to them that she suspects whoever killed her husband must be one of them. Soon, they too are being murdered one by one.
Where to watch The Killer Is One of Thirteen?
The Killer Is One of Thirteen is a horror movie featuring Paul Naschy and directed by Javier Aguirre.
The Killer Is One of Thirteen is currently streaming for free (ad-supported) on Tubi TV and it's also available on AMC+, AMC+ Amazon Channel, DIRECTV, Shudder and Shudder Amazon Channel.