"In San Francisco, detective partners Jack Packard and Doc Long are hired by socialite Jefferson Monk who believes someone is following him with the aim to kill him."
Jim Bannon
as Jack Packard
Nina Foch
as Ellen Monk
George Macready
as Jefferson Monk
Barton Yarborough
as Doc Long
Carole Mathews
as Jean Anderson
Lester Matthews
as Justin Reeves / Mr. G
Ernie Adams
as Gimpy (Uncredited)
Gary Bruce
as Intern (Uncredited)
Joseph Crehan
as Police Captain Quinn (Uncredited)
Franklyn Farnum
as Reporter (Uncredited)
Gregory Gaye
as Dr. Han (Uncredited)
Fred Graff
as Morgan (Uncredited)
Leo Mostovoy
as Vovaritch (Uncredited)
Frank O'Connor
as Jason 'Pegleg' Anderson (Uncredited)
Matty Roubert
as Newsboy (Uncredited)
Cosmo Sardo
as Reynolds (Uncredited)
Harry Semels
as Mr. G's Doorkeeper Servant (Uncredited)
Bhogwan Singh
as Villager (Uncredited)
Pietro Sosso
as Street Musician (Uncredited)
Isabel Withers
as Miss Osgood, Ellen's Nurse (Uncredited)
Kaye Dowd
as Girl on Bridge (Uncredited)
Carlyle Blackwell Jr.
as Man on Bridge (Uncredited)
Gene Stone
as Waiter (Uncredited)
Monty O'Grady
as Restaurant Patron (Uncredited)
James Conaty
Dick Gordon
Jay Eaton
Harold Miller
Larry Steers
Carlton E. Morse
Original Story
Mischa Bakaleinikoff
Additional Music
Louis Silvers
Mario Castelnuovo-Tedesco
Original Music Composer
Gregory Stone
Victor Schertzinger
Marianne Nussbaum
Researcher
Ben Oakland
Irving Briskin
Executive Producer
Ray Nazarro
Assistant Director
Gert Andersen
Camera Operator
Ned Scott
Still Photographer
John Leipold
Wallace MacDonald
Producer
Aaron Stell
Editor
Burnett Guffey
Director of Photography
Henry Levin
Director
Radio Play
George Brooks
Art Direction
Joseph Kish
Set Decoration
Edward Bernds
Sound Recordist
Charles O'Neal
Screenplay