- Ricardo Montalban
- Dr. Luis Delgado
- José Ferrer
- Dr. Alfred Vreeland
- Leslie Nielsen
- Official
- Chris Robinson
- Ledring
- Katherine Woodville
- Barbara Brand
- Lawrence P. Casey
- Bob Exeter
- Tom Simcox
- Jerry Hollis
- Curt Lowens
- Ehrlich
- Elisa Ingram
- Jean Hollis
- Joan Murphy
- Norma
- Austin Stoker
- Bogan
- Napoleon Reed
- Aganda Official
- Henry Mortimer
- Bellboy
- Phil Philbin
- First Technician
- Dan Chandler
- Sonar Man
- Ted Swanson
- Aide
- William Evenson
- Jim Morgan
- Kenneth M. Harris
- Second Technician
- Roger Phillips
- Third Technician
- Myron Natwick
- First Reporter
- Harlan Warde
- Second Reporter
