Whit Bissell
Prof. Frankenstein
Phyllis Coates
Margaret
Robert Burton
Dr. Karlton
Gary Conway
Bob / Teenage Monster
George Lynn
Sgt. Burns
John Cliff
Sgt. McAffee
Marshall Bradford
Dr. Randolph
Claudia Bryar
Arlene's Mother
A
Angela Austin
First Victim
R
Russ Whiteman
Dr. Elwood
Charles Seel
Mr. Sexton, the jeweler
P
Paul Keast
Man at Crash
G
Gretchen Thomas
Woman in Corridor
P
Patrick Miller
Police Officer (as Pat Miller)
J
Joy Stoner
Arlene
Larry Carr
Young Man (uncredited)
G
George DeNormand
Party Guest (uncredited)
J
James Gonzalez
Party Guest (uncredited)
Frank McLure
Party Guest (uncredited)
William H. O'Brien
Rooming House Boarder (uncredited)
N
Norman Stevans
Party Guest (uncredited)
Arthur Tovey
Party Guest (uncredited)