Richard Egan

David Sheppard

Constance Dowling

Joanna Merritt

Herbert Marshall

Dr. Van Ness

John Wengraf

Dr. Zeitman

Philip Van Zandt

Dr. Pierre Elzevir

Valerie Vernon

Mme. Elzevir

Byron Kane

Dr. Carter

Stephen Roberts

Maj. Howard

Michael Fox

Dr. Hubertus

Aline Towne

Dr. Kirby

Marian Richman

Helen

Jean Dean

Marna

William Schallert

Engle

David Alpert

Dr. Peter Burden

Tom Daly

Senator

Herbert L. Strock

Director

Tom Taggart

Screenplay

William Ferrari

Art Direction

Richard G. Taylor

Additional Dialogue

Herbert L. Strock

Editor

Victor A. Gangelin

Set Decoration

Lothrop B. Worth

Director of Photography

Ivan Tors

Story

Ivan Tors

Producer

Harry Sukman

Original Music Composer

Ivan Tors Productions