- Naomi Stevens - Norma
- Coleen Gray - Dorothy Nehf
- Jay C. Flippen - Hugh Ramsey
- James Caan - Rick Peterson
- Robert Duvall - Harvey Farnsworth
- Richard Conte - Jack Sallas
- Peter Lorre - Frederick Bergen
- John Marley - Luzet
- Josephine Hutchinson - Mrs. Blanchard
- Pat O’Brien - Inspector Dan Zarilla
- Adam Williams - Ben Jorgenson
- Ben Gazzara - Paul Bryan
- Lloyd Bridges - Mason Etheridge
- Mickey Rooney - Sheriff Williams
- Dean Stockwell - Martin Rosetti
- Stanley Adams - Pinky Ferguson
- Julie Harris - Lucy Bram
- Jo Van Fleet - Hildy Hesse
- Albert Dekker - Karl Hesse
- Sal Mineo - Ernie
- Claude Akins - Sergeant Phil Henning
- Pat Hingle - Ed Caldwell
- Lew Ayres - Dr. Thomas Clay
- Ian Wolfe - Ellis Stone
- Gary Lockwood - Frank Connery
- Walter Brooke - Col. Arthur Merriam
- Neil Hamilton - Mr. Harkin
- Murray Hamilton - Capt. Appleton
- Barbara Rush - Karen Lownes
- Bradford Dillman - Capt. David Young
- Byron Morrow - Leith Houser
- Peter Graves - Maj. Frank Whitaker
- Frederick O'Neal - Jacques Serac
- Telly Savalas - Ramon Castillo / Raymond Castle
- Frank Silvera - Sgt. Terrell
- Julie Adams - Ellen Yarnell
- Don Marshall - Cpl. Jenks
- Steve Forrest - David Buchanan
- Martha Hyer - Caroline Glenn
- Jack Klugman - Steve Zaro
- Robert Loggia - Mario Robrioz
- Don Collier - Detective Sgt. Newsome
- Dabney Coleman - William Gunther
- Ron Hayes - Deputy Dave Willett
- Robert Ellenstein - Raskob / Stevenson's attorney
- Nancy Malone - Nurse Linda Beaumont
- Lloyd Nolan - Gen. Amos Bailey
- Gena Rowlands - Janet Cord
- Leonard Nimoy - Lawrence Brody
- Jack Weston - Homer Fargis
- Tol Avery - Publisher
- James Whitmore - J. Marvin Bean
- John Forsythe - Jerry Wilson / John Williams
- Harry Townes - Richard
- Jack Kelly - Pete Braven
- David Lewis - Alan Brossanquet
- Warren Stevens - Mark Wilton
- Val Avery - Sergeant
- Frank Maxwell - Dr. Jackson 'Jack' Burnham
- Berkeley Harris - Public Defender
Naomi Stevens interpreta a Norma en la serie.
Coleen Gray interpreta a Dorothy Nehf en la serie.
Jay C. Flippen interpreta a Hugh Ramsey en la serie.
James Caan hace el papel de Rick Peterson.
Robert Duvall interpreta a Harvey Farnsworth en la serie.
Richard Conte interpreta a Jack Sallas en la serie.
Peter Lorre interpreta a Frederick Bergen en la serie.
John Marley interpreta a Luzet en la serie.
Josephine Hutchinson interpreta a Mrs. Blanchard en la serie.
Pat O’Brien hace el papel de Inspector Dan Zarilla.
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