A list of actors that appeared in The Invaders and related media.
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Appeared in The Invaders (1967-68):
- Richard Anderson: Blake
- E. J. André: Dr. Henry Thorne
- Edward Andrews: Evans
- R. G. Armstrong: Capt. Bill Battersea/Gus Flagg
- Edward Asner: Harry Ferguson/Taugus
- Diane Baker: Kathy Adams
- Eddie Barth: Cab Driver
- Ed Begley: Dr. Sam Crowell/Simon Carver
- Ralph Bellamy: Morgan Tate
- Karen Black: Claudia Stone
- Victor Brandt: Joey Taft
- Peter Brocco: Millington
- Barry Cahill: Dorsey
- Joseph Campanella: Father Joe
- J. D. Cannon: Peter Kalter/Lt. Ben Holman
- Virginia Christine: Mrs. Thorne
- Dabney Coleman: John Carter/Captain Mitchell Ross
- Michael Constantine: Martin Willard
- Dana Elcar: Sheriff Halloway
- Robert Emhardt: Oliver Ames
- Norman Fell: Neal Taft
- Anne Francis: Annie Rhoades
- Will Geer: Hank Willis
- Lynda Day George: Janet Wilk
- Jonathan Goldsmith: Kevin Ryan
- Louis Gossett Jr.: Ollie
- Harold Gould: County Attorney Slater/Dr. Paul Mailer
- Peter Graves: Gavin Lewis
- Gene Hackman: Tom Jessup
- Barbara Hershey: Beth Ferguson
- Pat Hingle: Brother Avery
- Mary Jackson: Hattie Willis/Nurse
- Katherine Justice: Janet Garner/Helen
- Barbara in Quinn Martin's Tales of the Unexpected: The Nomads
- Sally Kellerman: Laura Crowell
- Shirley Knight: Maggie Cook
- Ted Knight: Major
- Louise Latham: Joan Corman
- Joanne Linville: Pat Reed/Angela Smith
- Peggy Lipton: Bride
- Jack Lord: George Vikor
- Ken Lynch: Lt. Conners
- Janet MacLachlan: Celia Baxter
- Nan Martin: Dr. Maria McKinley
- Kevin McCarthy (actor): Paul Cook
- Roddy McDowall: Lloyd Lindstrom
- Tim McIntire: Hal/Steve Gibbs
- John McLiam: Hotel Clerk
- Burgess Meredith: Theodore Booth
- Byron Morrow: Colonel Newcomb/Gilbert
- Barry Morse: Keith
- Diana Muldaur: Claire
- Jeanette Nolan: Miss Havergill
- Susan Oliver: Joan Seeley/Stacy
- Kelly Jean Peters: Nicole
- Barney Phillips: Emmett Morgan/Walt Anson
- Suzanne Pleshette: Anne Gibbs/Vikki
- Andrew Prine: Vern
- Bill Quinn: Lt. Eaton
- Ford Rainey: Gen. Jonathan Blaine/George Grundy
- John Randolph: Sgt. Ernie Goldhaver
- Peter Mark Richman: Andrew Hatcher/Tom Wiley
- Wayne Rogers: Lt. John Mattson
- Alfred Ryder: Mr. Nexus/Ryder (Alien Leader)/Invaders Leader
- James B. Sikking: The real Captain Taft
- Patricia Smith: Sally/Edna Greely
- Julie Sommars: Grace Vincent
- Raymond St. Jacques: Jim Baxter
- John Stephenson: John Niven
- Roy Thinnes: David Vincent
- David Vincent in The Invaders (1995)
- Jack Warden: Barney Cahill
- Fritz Weaver: Ambassador Peter Bork
- Dawn Wells: Eileen Brown
- James Whitmore: Harry Swain
- Barry Williams: Boy
- William Windom: Michael Tressider/Major Rick Graves
- Jason Wingreen: Court Clerk
- Bill Zuckert: Wisnofski
Appeared in Quinn Martin's Tales of the Unexpected episode "The Nomads" (1977):
- David Birney: Paul Rogers
- William Campbell: M/Sgt. Sullivan
- William Conrad: Narrator
- David Huddleston: Sheriff Henry
- Eugene Roche: Major Jim Langston
Appeared in the QM TV movie The Aliens Are Coming (originally titled The New Invaders) (1980):
- Eric Braeden: Leonard Nero
- Max Gail: Russ Garner
- Ed Harris: Chuck Polcheck
- Matthew Labyorteaux: Timmy Garner
- Tom Mason: Dr. Scott Dryden
- Gerald McRaney: Patrolman Ashley
Appeared in the miniseries The Invaders (1995):
- Scott Bakula: Nolan Wood
- Richard Belzer: Randy Stein
- Jack Kehler: Monck Patterson
- Shannon Kenny: Grace
- Terence Knox: Police Lt. 'Mac' Coyle
- DeLane Matthews: Amanda Thayer
- Elizabeth Peña: Ellen Garza
- Jon Polito: Whitley, Metro HQ
- Debra Jo Rupp: Rita
- Todd Susman: Police Capt. Johnson
- Richard Thomas: Jerry Thayer
