William Lundigan
Dr. Richard Donald Stanton
Acting
Herbert Marshall
Dr. Donald L. Stanton / Narrator
Acting
Richard Carlson
Dr. Jerry Lockwood
Acting
Martha Hyer
Dr. Jane Flynn
Acting
Dawn Addams
Susan Manners
Acting
Robert Karnes
Walter Gordon
Acting
Lawrence Dobkin
Dr. Delmar
Acting
George Eldredge
Dr. Paul Dryden
Acting
Dan Riss
Dr. Frank Werner
Acting
Michael Fox
Dr. Klinger
Acting
King Donovan
James O'Herli
Acting
Kem Dibbs
David Wells
Acting
James Best
Dr. Sidney K. Fuller
Acting