The Keep (1983)

Nazis are forced to turn to a Jewish historian for help in battling the ancient demon they have inadvertently freed from its prison.

Director: Michael Mann

Cast: Scott Glenn, Ian McKellen, Alberta Watson, Jürgen Prochnow, Robert Prosky, Gabriel Byrne, William Morgan Sheppard, Royston Tickner, Michael Carter, Phillip Joseph, John Vine, Jona Jones, Wolf Kahler, Rosalie Crutchley, Frederick Warder, Bruce Payne, David Cardy, John Eastham