George C. Scott
Lt. William 'Bill' Kinderman
Ed Flanders
Father Joseph Kevin Dyer
Brad Dourif
James Venamun / The Gemini Killer
Jason Miller
Father Damien Karras / Patient X
Nicol Williamson
Father Morning
Scott Wilson
Dr. Temple
Nancy Fish
Nurse Allerton
George DiCenzo
Stedman
Don Gordon
Ryan
Lee Richardson
University President
Grand L. Bush
Sergeant Atkins
Mary Jackson
Mrs. Clelia
Viveca Lindfors
Nurse X
Ken Lerner
Dr. Freedman
