original title: La Noche del Terror Ciego
aka: Crypt of the Blind Dead, Mark of the Devil Part 5: Night of the Blind Terror, Mark of the Devil Part 4: Tombs of the Blind Dead, Night of the Blind Dead, Revenge from Planet Ape, The Blind Dead
Director: Amando de Ossorio
Starring: Lone Fleming, Cesar Burner, Maria Elena Arpon, Jose Thelman, Rufino Ingles
Who are these unholy savages who hunt out their victims by sound alone?
Roger and Virginia is on holiday and runs into Betty, an old friend of Virginia. She joins them on a train ride but while on the train Virginia gets embarrassed after seeing her boyfriend start to have some interest in Betty and by her own lesbian encounter she herself had with Betty in their younger days.
She decides to jump off the train and when night comes she seeks refuge in an ancient monastery. She is never seen again so Roger and Betty tries to hunt her down and investigate what might have happened to her and they all come face to face with the undead Knight Templars.