- Argentina Brunetti - Mrs. Doris Michaels
- Judi Meredith - Mary Burnett
- Paul Burke - Harry Klorr
- Yvette Vickers - Sally
- Herbert Rudley - Fred - State's Attorney
- Charles Bronson - Eddie Loder
- Marc Lawrence - Vince Cronin
- William Boyett - Detective Sgt. Harris
- Don Dubbins - Stick Wilson
- Herb Vigran - Danny
- Bobby Jordan - Car Lot Employee
- Philip Phillips - George Frankliln
- Robert Karnes - Harry Conklin
- Sue Randall - Mrs. Jim Wilson (uncredited)
- Jay Novello - Max Williams
- Adam Williams - Denny Sutton
- Jimmy Lydon - Joseph Rinehart
- William Forrest - Mr. Manning
- Virginia Christine - Mrs. Jake Fassard
- Whit Bissell - Tommy Hatch
- Ray Stricklyn - Vern Sawder
- Robert Clarke - Ralph Mattson
- George E. Stone - Fingers Purdy
- Howard Petrie - Patrick - Heist Team Boss
- Ken Christy - Farley
- Greta Thyssen - Lisa
- Peter Brocco - Druggist
- Olan Soule - Tailor
- Wally Brown - Milkman
- Werner Klemperer - Heinrich Ronn
- Walter Reed - States Attorney
- Russ Conway - Detective Ben Cooper
- Robert McQueeney - Charlie
- Bobby Driscoll - Stephen 'Steve' Wikowlski
- Angie Dickinson - Hazel McLean
- Willard Parker - Malcolm Grove
- Ron Hayes - Police Lt. Harry Summers
- Angela Greene - Mildred Barnes
- Ed Reimers - Announcer
- Jean Carson - Doris Colby
- Peg La Centra - Mrs. Lowell
- Nico Minardos - Henry Edom
- John Hoyt - Dr. Carter
- Diane Brewster - Hazel Lawton
- Paul Comi - Jojo
- Pat O'Malley - Mr. Cleary
- Dayton Lummis - Jonas Warman
- Meg Wyllie - Mrs. Timmons
- Bill Williams - Jerry Langdon
- Doris Packer - Mrs. Warren
- Amzie Strickland - Kate Larson
- Rose Marie - Margo
- Fay Spain - Ruth Reardon
- Paula Raymond - Simone Brayden
- Jean Del Val - Papa Tokar
- Robert Fuller - Danny Mitchell
- Jack Mullaney - Bert Rockwood
- Joanna Barnes - Tammy Worth
- George Mathews - Bricker
- Don Oreck - Paul Michaels
- Jeanne Bates - Nurse
- William Keene - Captain Bates
- Howard McNear - Carl Hoganson
- Frank Albertson - Walter Ashton
- Fred Graham - Tiger Phil Kelly (uncredited)
- Carole Mathews - Ruth Webster
- John Zaremba - Hotel Clerk
- John Archer - Brad Morgan
- Carol Ohmart - Edna Reed
- Joyce Meadows - Mrs. Jane Barkley
- Joan Vohs - Julie Darrell
- Vinton Hayworth - Russell Madison
- Robert H. Harris - Manny Franchette
- Tom Reese - Monk
- John Mitchum - First Mate
- Stafford Repp - Georgie Mink
- Pamela Duncan - Christine Edmonson
- Mike Connors - Pete Wikowlski
- Lyle Talbot - Paul Crowley
- William Bakewell - Detective
- Sid Melton - Eddie Lee
- John Doucette - Police Sgt. Lou Pulaski
- Kathryn Minner - Witness
- Kem Dibbs - Louie Ferrante
- Bethel Leslie - Doris Holt
- Alan Baxter - Russ Mortell
- Esther Dale - Julia Sheldon
- Gloria Talbott - Ellen Carter
- Rachel Ames - Greta Loder
- Myron Healey - Hal Sherman
- Tol Avery - Eddie Constantine
- Ken Clark - Paul Lawson
- Philip Ober - George Brayden
- Roscoe Ates - Edwin Winkler
- Harry Landers - Torrance
- Harry Landers - Max Decker
- Joe Maross - Carl Warfield
- Dan Tobin - Steve Lanley
- Leonard P. Geer - Goozy
- Michael Pataki - Sid Davie
- Ed Nelson - Lenny Maston
- Peter Leeds - Larry Blair
- Tetsu Komai - Fred Keyoto
- Bill Quinn - Detective Ken Donovan
- Barry Kelley - Joe Whittaker
- Nan Leslie - Martha Conklin
- Katherine Warren - Mrs. Leonard
- John Bryant - Albert Taylor
- Aline Towne - Gloria Stark
- Betty Lynn - Susan Baines
- Stanley Adams - Ed - Bartender
- Bruce Gordon - Peter Grauman
- Jimmy Cross - Lookout
- Barbara Pepper - Landlady
- Paul Birch - Police Lt. Ruddy
- Barney Phillips - Doctor
- Barney Phillips - Dr. Lester Bowers
- Jean Willes - Thelma Goodrich
- Raymond Bailey - Hinder's Lawyer
- Elizabeth Harrower - Mrs. Michaels
- Elizabeth Harrower - Walls' Secretary
- Kent Smith - Howard Meston
- Bill Erwin - Roger Jessop
- Bill Erwin - Detective Gene
- Linda Watkins - Mrs. Gardner
- Whitney Blake - Susan Spencer
- William Hudson - Paul Webster
- William Hudson - Tom Ferris
- Jack Elam - Luke Morgan
- John Beradino - Detective D'amico
- John Beradino - Nick Cordell
- Bartlett Robinson - Henry Hellstrom
- Howard Wendell - Barrett
- William Phipps - Joe Mazzerin
- William Phipps - Al 'Bugsy' Page
- George Eldredge - Dr. Robert Eldredge
- Dick Wilson - Max Pushkin
- Dick Wilson - Moe Norton
- Frank Sully - Officer Ed Grady
- Charles Bateman - Detective - Missing Persons Bureau
- Don Kennedy - Officer Andy Morolo
- Dick Crockett - First Witness
- Lyle Latell - Nick Anson
- William Allyn - Bill Leonard
- Barbara Stuart - Barbara Gates
- Ralph Votrian - Herbie Ryder
- Rand Brooks - Purser
- Rusty Lane - Mel Harmon
- Henry Brandon - Bert Fallon
- James Griffith - James Keniton
- Kevin Hagen - Eddie Ferguson
- Paul Maxwell - Andy Markham
- Paul Maxwell - Jim Landry
- Harlan Warde - Marty Pryor
- Harlan Warde - Wally
- Margaret Field - Laura M. Canby
- Margaret Field - Rose Pulaski Mooney
- Ross Elliott - Police Sgt. Smith
- Ross Elliott - Vincent Hurd
- Michael Masters - Health Club Instructor
- Edward Binns - Wally Gardner
- Marian Seldes - Martha Wicklow
- Harry Bartell - Jed Stanner
- Harry Bartell - Johnny Clavell
- Dick Miller - Pete Castro
- John Harmon - Charlie Andalucia
- John Harmon - Babe
- Jeanne Baird - Mary Allison
- Percy Helton - Harry Kreble
- Robert Osterloh - Joe DaLiso
- Tyler McVey - Robert Trommer
- Joseph Mell - Landlord
- Jeanne Cooper - Julia Gifford
- Rick Vallin - 'Blue Indigo' Requestor at Ballroom
- David Lewis - Jerry Kane
- Ruta Lee - Connie Meston
- Ruta Lee - Ora Kane
- Ferris Taylor - Arthur Quinn
- Patricia Huston - Mary Pulaski
- Virginia Gregg - Mrs. Mitchell
- Paul Langton - Van Wert
- Lawrence Dobkin - Louie Prince
- Lawrence Dobkin - Barney Traxler
- Larry Thor - Police Sgt. Jordan
- S. John Launer - Police Captain Timothy Riley
- S. John Launer - Carl Wright
- William Fawcett - Guard
- Gavin Gordon - Bongure
- Dave Barry - Richard Lowell
- Alix Talton - Karen Peters
- Vici Raaf - Rita St. Clair
- Vici Raaf - Record Shop Blonde
- Jeanne Dante - Nurse
- DeForest Kelley - Police Sgt. Miller
- DeForest Kelley - Detective
- Theodore Newton - Tom Booth
- Jack Carr - Officer Mike Callahan
- Katharine Bard - Louise Garrison
- Dean Harens - Claude Garrison
- June Dayton - Evelyn Rankin
- Duncan McLeod - Police Sgt. Wendell
- H.M. Wynant - Victor Charbonneau
- Joe Di Reda - Archie
- Ted Hecht - Fred Heaton
- Sue George - Irene Hanson
- Morris Ankrum - Police Inspector Dean
- Dorothea Lord - Mrs. Halper
- Jody Lawrance - Rebecca Traxler (as Jody Lawrence)
- Maxwell Shane
James Griffith interpreta a James Keniton en la serie.
Percy Helton interpreta a Harry Kreble en la serie.
Marc Lawrence hace el papel de Vince Cronin.
Philip Ober interpreta a George Brayden en la serie.
Adam Williams interpreta a Denny Sutton en la serie.
Edward Binns hace el papel de Wally Gardner.
George E. Stone interpreta a Fingers Purdy en la serie.
Charles Bronson hace el papel de Eddie Loder.
Gavin Gordon interpreta a Bongure en la serie.
Stanley Adams interpreta a Ed - Bartender en la serie.
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