- Debra Paget - Mary Connors
- Vince Edwards - Carl Markheim
- Jeffrey Hunter - Dick Cannock
- William Hopper - Philip Harland
- Dale Robertson - Lt. Clay Tucker
- Linda Darnell - Lily Martyn
- Ed Wynn - John Hodges
- James Drury - Anton Cavrek
- Peter Marshall - Mechanic (uncredited)
- Steve McQueen - Kinsella
- Trevor Howard - Doug Elliott
- Walter Slezak - Emil Markheim
- Fay Wray - Agnes Marsh
- Raymond Bailey - Claffey
- Katherine Warren - Amelia Newcombe
- Norma Varden - Mrs. Sylvester
- Tris Coffin - Scoutmaster
- Joe Mantell - Leo Vardosch
- Alexander Scourby - Joe Markheim
- Virginia Field - Venetia
- Macdonald Carey - Fred Gaily
- Peter Lorre - Moyzisch
- Beverly Washburn - Ruthie
- Tommy Ivo - Everett Moore
- Richard Conte - Jimmy Ringo
- Audrey Dalton - Carey Rydal
- Bette Davis - Marie Hoke
- Carl Benton Reid - Dr. Merriam
- Carl Benton Reid - Mr. Dole
- Carl Benton Reid - Marlowe
- George Eldredge - Mr. Beecher
- Ray Collins - Callicott
- Ray Collins - Judge Harper
- Wallis Clark - Mr. Morgan
- Conrad Nagel - William T. Stinson
- John Pickard - Pilot
- Steve Conte - Announcer
- Willis Bouchey - Darby (uncredited)
- Willis Bouchey - Alderson
- Jack Gargan - Agent
- Herbert Lytton - Court Clerk
- Herbert Lytton - Ticket Agent
- Robert Wagner - Gil Carter
- Robert Wagner - Wade Connors
- Ray Teal - Bartlett
- Barney Phillips - Parkman
- Harry Harvey - Telegraph Operator
- Harry Harvey - Al Neavins
- John Doucette - (voice)
- John Eldredge - Bill Smythe
- Teresa Wright - Doris Walker
- Eve McVeagh - Nurse
- Alexis Smith - Emily Hefferan
- Nancy Kulp - Miss Gillis
- Lee Patrick - Emmie Wasey
- Ellen Corby - Minerva Comstock
- Harry Morgan - Mike Feeney
- William Bishop - Matt Hornbeck
- Wallace Ford - Monty Smith
- George E. Stone - Angelo
- Taylor Holmes - Judge Tyler
- Raymond Burr - Major Tetley
- Michael Ansara - Jeff Farnley
- Russell Simpson - Old Man
- Robert Adler - Mark
- Dan Riss - Doc MacGowen
- Dan Riss - Mr. Watson
- Marjorie Bennett - Dress Shop Owner
- Spring Byington - Mrs. Miller
- Albert Carrier - Carlos Mansini
- Terry Moore - Ann Winslow
- Mario Siletti - Joe the Junkman
- Gavin Muir - Harry
- Gavin Muir - MacFadden
- Robert Sterling - Steve Buchanan
- Will Wright - Judge O'Neill
- Carleton Young - Assistant U.S. Attorney
- Paul Smith - Store Clerk
- Maudie Prickett - Miss Prossy
- Maudie Prickett - Mrs. Pennyfeather
- Marilyn Erskine - Peggy
- Jamie Farr - Pablo
- Michael Landon - Eddie
- Carolyn Jones - Rita Kirby
- Carolyn Jones - Marcia Bridges
- Noel Drayton - Hedges
- Noel Drayton - Alfred Bridges
- Noel Drayton - Wilkins (uncredited)
- Peter Brocco - 1st Bartender
- Richard Deacon - Paul Erickson
- Percy Helton - Barber (uncredited)
- Percy Helton - Judge (uncredited)
- Patrick McVey - Sgt. Duffy
- Abel Fernandez - Indian Chief (uncredited)
- Jerry Paris - Joe Elliot
- Jerry Paris - Ferguson
- Morgan Jones - Trooper (uncredited)
- Richard Jaeckel - Ed Miller
- Robert Armstrong - Pop
- Robert Bray - Mike Miller
- Herb Vigran - Postal Clerk
- Herb Vigran - Joe
- Lawrence Dobkin - Sparks
- Robert Foulk - Clovis
- Brett Halsey - Copter Pilot
- Don Kennedy - Peterson
- Max Showalter - Barry
- Herbert Anderson - Bob Perkins
- Don C. Harvey - Bellini
- Alan Napier - Governor
- Alan Napier - Travers
- Alan Napier - Sir Edward
- Anthony Eustrel - Mr. Ogilvie
- Fred MacMurray - Peterson
- Claude Akins - Anton Budenieff
- William Challee - Malatta
- William Challee - Trooper (uncredited)
- Joanne Woodward - Eleanor Apley
- Arthur Franz - Howard Boulder
- Arthur Franz - Ben Macready
- Robert Osterloh - Tom Robinson
- Michael Rennie - Narrator
- William Bendix - Captain George Devlin
- Gene Barry - Lieutenant Eddie Pfeiffer
- Horace McMahon - Rick Vega
- Susan Seaforth Hayes - Ellie
- Norman Alden - Frank Fallom
- Paul Brinegar - Milkman (uncredited)
- Richard Devon - Hotel Doorman (uncredited)
- Marsha Hunt - Mary
- Rick Jason - Hank Adams
- Denver Pyle - Charley
- Denver Pyle - Lester
- Farley Granger - Steve Adams
- Roy Del Ruth
- Lewis Allen
- Jules Munshin
- Bernard Girard
- William D. Russell
- Don Weis
- John L. Greene
- Oscar Millard
- Sam Peckinpah
- John Monks Jr.
- Dale Eunson
- DeWitt Bodeen
Debra Paget hace el papel de Mary Connors.
Vince Edwards interpreta a Carl Markheim en la serie.
Jeffrey Hunter interpreta a Dick Cannock en la serie.
William Hopper interpreta a Philip Harland en la serie.
Dale Robertson interpreta a Lt. Clay Tucker en la serie.
Linda Darnell interpreta a Lily Martyn en la serie.
Ed Wynn interpreta a John Hodges en la serie.
James Drury interpreta a Anton Cavrek en la serie.
Peter Marshall hace el papel de Mechanic (uncredited).
Steve McQueen hace el papel de Kinsella.
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