Characters played by Henry O'Neill
Dr. Everett Colner
Characters played by Morris Ankrum
Lt. Pat McKay
Characters played by Arthur Space
Burton Caighn Jr.
Characters played by Paul Guilfoyle
Dudley Badger
Characters played by Dorothy Adams
Mrs. Mary Abbott
Characters played by Paul Langton
Peter Selkin
Characters played by William Tannen
McKay's Assistant
Characters played by John Vosper
Dr. Elton Parkson
Characters played by Jacqueline White
Jean Smith