Robert Quarry as Count Yorga

Mariette Hartley as Cynthia Nelson

Roger Perry as Dr. David Baldwin

Yvonne Wilder as Jennifer Nelson

Tom Toner as Rev. Thomas

Rudy De Luca as Lieutenant Madden

George Macready as Professor Rightstat

Walter Brooke as Bill Nelson

Edward Walsh as Brudah

Craig T. Nelson as Sgt. O'Connor

Karen Ericson as Ellen Nelson

Michael Pataki as Joe

Allen Joseph as Michael Farmer

Peg Shirley as Claret Farmer

David Lampson as Jason - Ellen's Boyfriend

Liz Rogers as Laurie Greggs

Philip Frame as Tommy

Helen Baron as Mrs. Marcia Nelson

Jesse Welles as Mitzi Carthay

Paul Hansen as Jonathan Greggs