Γκρίζος Εφιάλτης (1976)
Κυκλοφόρησε: May 21, 1976
Χρόνος εκτέλεσης: 91 λεπτά
Είδος: Τρόμου, Περιπέτεια, Θρίλερ
Αστέρια: Christopher George, Andrew Prine, Richard Jaeckel, Joan McCall, Joe Dorsey, Charles Kissinger
Crew: William Girdler (Director), Harvey Flaxman (Screenplay), David Sheldon (Screenplay), Harvey Flaxman (Producer), David Sheldon (Producer), Edward L. Montoro (Executive Producer)