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

Angela Austin

First Victim

Russ Whiteman

Dr. Elwood

Charles Seel

Mr. Sexton, the jeweler

Paul Keast

Man at Crash

Gretchen Thomas

Woman in Corridor

Patrick Miller

Police Officer (as Pat Miller)

Joy Stoner

Arlene

Larry Carr

Young Man (uncredited)

George DeNormand

Party Guest (uncredited)

James Gonzalez

Party Guest (uncredited)

Frank McLure

Party Guest (uncredited)

William H. O'Brien

Rooming House Boarder (uncredited)

Norman Stevans

Party Guest (uncredited)

Arthur Tovey

Party Guest (uncredited)