The Keep Info:

Released in US	December 16, 1983
Total US Gross	$3,661,757
Distributed by	Paramount Pictures
Source	Based on Book/Short Story
Major Genre	Horror
Country	United States
Director	Michael Mann

Cast:

Scott Glenn		( as Glaeken Trismegestus )
Gabriel Byrne		( as Major Kaempffer )
Ian McKellen		( as Dr. Theodore Cuza )
Robert Prosky		( as Father Fonescu )
Jurgen Prochnow		( as Captain Klaus Woermann )