Gene Barry
— Dr. Frank Addison
Lydia Clarke
— Martha Addison
Michael Moore
— Russ Farley
Nancy Gates
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Lee Aaker
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Milburn Stone
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Bert Freed
— Emil Jablons
Frank Cady
— F.B.I. Agent George Weinberg
Houseley Stevenson Jr.
— 'Greg' Gregson
Leonard Strong
— Donald Clark
Jerry Hausner
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John Damler
— Dr. Peter Rassett
George Lynn
— Robert Kalnick
Olan Soule
— Mortie Fenton
Anthony Warde
— Arnie Molter
Tommy Farrell
— Baseball Game Usher
Mary Murphy
— Young Woman Buying Stamps