Ed Begley Jr.
Frank
Acting
E.J. André
Mr. McCauley
Acting
Ann Doran
Mrs. McCauley
Acting
Christina Hart
Helen
Acting
Orin Cannon
Old Farmer
Acting
Jean Le Bouvier
Mrs. Cantrell
Acting
Dick McGarvin
Mr. Dorset
Acting
Karen Hurley
Mr. Dorset
Acting
Patrick Macnee
Dr. Gheria
Acting
Anjanette Comer
Alexis
Acting
Elisha Cook Jr.
Karel
Acting
Horst Buchholz
Michael
Acting
Joan Hackett
Mother
Acting
Lee Montgomery
Bobby
Acting
Michael Talbott
Vinnie McCauley (uncredited)
Acting
Gail Bowman
Maria (uncredited)
Acting
John Dehner
Narrator (voice) (uncredited)
Acting
Joan Lemmo
Eva (uncredited)
Acting
Jeff Reese
Young Man (uncredited)
Acting
Lars Green
Demonic Bobby (uncredited)
Acting