Dr. Leon Kravaal

Boris Karloff

Dr. Tim Mason

Roger Pryor

Nurse Judith Blair

Jo Ann Sayers

Bob Adams

Stanley Brown

John Hawthorne

John Dilson

Sheriff Stanton

Hal Taliaferro

Dr. Bassett

Byron Foulger

Dr. Harvey

Charles Trowbridge

Pete Daggett

Ernie Adams

Frozen Body of Jasper Adams (uncredited)

Lee Willard

Sheriff Haley (uncredited)

Ivan Miller

Frozen Therapy Patient (uncredited)

Minta Durfee

Doctor Spectator Explaining Procedure (uncredited)

Charles Miller

State Trooper (uncredited)

Bruce Bennett

Doctor Spectator Listening to Explanation

Eddie Dew

Doctor Spectator (uncredited)

James Conaty

Doctor Spectator

Wedgwood Nowell

Doctor Spectator (uncredited)

Cyril Ring

Doctor Spectator (uncredited)

William Marion

Doctor Spectator

Marion Williams

Doctor Spectator

Landers Stevens

Doctor in Front Row in Final Scene

Charles Halton