cast
-
Ivan Dixon
Sgt. James Conover / Major Harold Giles
-
John Hoyt
Professor Hebbel / Bifrost Alien / Emmett Balfour
-
Robert Culp
Trent / Allen Leighton / Paul Cameron
-
Robert Duvall
Adam Ballard / Louis Mace
-
Willard Sage
Coulter / First Reporter / Chief of Staff
-
Jason Wingreen
Fred Severn / Coroner Leland / Bill Turner
-
Edward Platt
David Hunt (as Edward C. Platt) / Mr. Terrence / Dean Radcliffe
-
Douglas Henderson
Dr. Paul Fredericks (uncredited) / Detective Lt. Runyan / Dr. Tillyard
-
Ben Wright
Philip Exeter Dundee / Gen. Benton / Elder of Luminos
-
Robert Fortier
Budge / Dr. Paul Pollard / Bert Hamil
-
Ted de Corsia
Randolph E. Branch / New Sentry
-
Dabney Coleman
Lt. Rupert Lawrence Howard (uncredited) / James Custer / Dr. Williams
-
Philip Abbott
Lincoln Russell / Ben Fields
-
David Frankham
Capt. Terrence Ralph Brookman / Harvey Kry Jr.
-
Henry Silva
General Juan Mercurio / Chino Rivera
-
Kent Smith
Aabel / Dr. Block
- William Stevens Policeman / Navigator Dexter
- Janos Prohaska The Mikie / Thetan (uncredited)
-
Martin Landau
Andro / Richard Bellero
-
Geraldine Brooks
Yvette Leighton / Ann Barton
-
Joan Camden
Prof. Stephanie Linden / Ann Pearson
-
Aki Aleong
Akada / Dr. Sui-Lin
-
Don Gordon
Dave Crowell / Luis B. Spain
- William Douglas Henry Castle / Galaxy Being (as Wm. O. Douglas)
-
Sally Kellerman
Judith Bellero / Ingrid Larkin
-
David McCallum
Gwyllm Griffiths / Tone Hobart
-
Allyson Ames
Arndis Pollard / Loreen
-
Scott Marlowe
Jory Peters / André
-
Neil Hamilton
Hilary J. Clarke / Richard Bellero, Sr.
-
Henry Scott
FBI Agent Marshall / Electronics
- Nellie Burt Ethel Latimer / Justice's Wife
-
Walter Burke
Recruiter / Dr. Frederick Riner
-
Peter Mark Richman
Jefferson Rome / Prof. Ian Fraser
-
James Shigeta
AIO Captain Newa / Maj. Jong
-
Jacqueline Scott
Carol Maxwell / Dr. Alicia Hendrix
- Sam Reese Clyde Wyatt / George Wilkerson (as Sammy Reese)
- Robert Doyle Wilt Morgan / Marc Lake
-
George Macready
Larry K. Hillerman / Dr. Marshall
-
Shirley O'Hara
Receptionist / Dr. Soldini
- Peter Madsen Carter - Watchman / Reporter #2
-
Tim O'Connor
Major Clint Anderson / Paul Tanner / Voice in The Enemy's war helmet (voice)
-
Konstantin Shayne
Philip Fletcher / The Gardener
- Linda Hutchings The Nurse / Arlene Schnabel
-
Vaughn Taylor
Dean Flint / Randall Latimer
-
Dabbs Greer
E. F. Larkin / Mr. Bishop
-
Rudy Solari
Captain Buckley / Griffin
-
Gail Kobe
Janet Doweling / Janet
-
Crahan Denton
Dr. Matthew James / Sheriff Simon Stakefield
-
Leonard Nimoy
Konig / Judson Ellis
-
Curt Conway
Dr. Philip Mendl / Franklin Karlin
-
Bob Johnson
The Senator (voice) / Project Adonis Intercom Announcer (voice) (uncredited)
-
Paul Lukather
Nichols / Official
-
James B. Sikking
Botany / Orderly
-
Donald Harron
Art Harris
-
Steve Ihnat
Lt. Minns
-
Dee Pollock
Francis Hadley, P.F.C.
-
James Frawley
Robert Renaldo
-
Kim Hector
Johnny Subiron
-
Morgan Brittany
Minerva / Minerva Gordon
-
Lee Philips
Radio DJ Gene 'Buddy' Maxwell
-
Jill Haworth
Cathy Evans
-
Alan Baxter
Colonel Grover
-
Henry Darrow
Policeman
-
Miriam Hopkins
Mary Kry
-
Olive Deering
Lisa Lawrence
-
Carroll O'Connor
Deimos
-
BarBara Luna
Gaby Christian
-
Diana Sands
Dr. Julia Harrison
-
Nick Adams
Mike Benson
-
Salome Jens
Laurie Cameron
-
Patrick O'Neal
Jonathan Meridith
-
Eddie Albert
Andy Thorne
-
Dewey Martin
Jim Darcy
-
Burt Metcalfe
Eddie Phillips
-
Bert Remsen
Frank Summers
-
Billy Green Bush
Tom - Duckhunter #3 (as William Bush)
-
Donald Pleasence
Harold J. Finley
-
Edward Mulhare
Professor Mathers
-
Jeff Corey
Byron Lomax
-
Ron Randell
Henderson James
-
Shirley Knight
Noelle Anderson
-
Alfred Ryder
Edgar Price
-
Ron Hayes
Pilot Coberly
-
Ed Asner
Detective Sgt. Thomas Siroleo
-
Michael Tolan
Prof. Stephen Grave
-
Grace Lee Whitney
Carla Duveen
-
Larry Pennell
Dr. Evan Marshall
-
Geoffrey Horne
Wade Norton
-
Nancy Malone
Laura Hanley
-
John Anderson
Ebonite Interrogator
-
Howard Da Silva
Thurman Cutler (as Howard da Silva)
-
William Shatner
Gen. Jeff Barton
-
June Havoc
Karen Thorne
-
Mary Murphy
Linda Darcy
-
Leslie Stevens
Election Returns Commentator (voice) (uncredited)
-
Leonard Stone
Dr. Phillip Gainer
-
John Marley
Dr. Sigmund Hindeman
-
Gary Merrill
Dr. James Hamilton / Major Roger Brothers
-
Francis De Sales
Prison Warden (as Francis de Sales)
-
Ralph Meeker
John Dexter
-
Russell Collins
Justice of the Peace
-
Ruth Roman
Prof. Diana Brice
-
Lloyd Nolan
Tom Kagan
-
Sam Wanamaker
Dr. Simon Holm
-
Michael Forest
Prof. Stuart Peters
-
Bruce Dern
Ben Garth
-
Barry Morse
Phobos One
-
Vera Miles
Kassia Paine
-
Martin Sheen
Pvt. Arthur Dix
-
Peter Lind Hayes
Dr. James Stone
-
Michael Constantine
Joe Dix
- Kay E. Kuter Limbo Being
-
Peggy Ann Garner
Amanda Frank
-
Mark Roberts
Bob Conner
-
Paul Lambert
Dr. Henschell
- Nora Marlowe Mrs. Ives
-
Peter Breck
Senator Orville
-
Harry Guardino
Major Roger Brothers / Dr. James Hamilton
-
Jerry Douglas
Tom Evans
-
Melinda Casey
Vivia Balfour Hayden
-
Robert Webber
Ikar
-
Phyllis Love
Andrea Holm
-
Gladys Cooper
Mrs. Palmer
-
Michael Higgins
Dr. Thomas Kellander
-
Ed Nelson
Col. Luke Stone
-
William Boyett
Co-Pilot Beeman
-
Cliff Robertson
Alan Maxwell
-
Phillip Pine
Ted Pearson
-
Frank Maxwell
Dr. Keenan
-
Harry Townes
Clifford Scott
-
Martín Garralaga
Paco
-
Buck Taylor
Gard Hayden
-
Nina Foch
Eva Fraser
-
Cedric Hardwicke
Colas (as Sir Cedric Hardwicke)
-
Adam West
Major Merritt
-
Ford Rainey
D.A. Thomas Coyle
-
Arthur Hunnicutt
Lamont
-
Sidney Blackmer
William Lyons Selby
-
Priscilla Morrill
Vera Finley
-
Joe De Santis
Colonel William Campbell
-
Janet Blair
Lynn Arthur
-
Barry Jones
Dwight Hartley
-
Bernard Kates
Dr. Whorf
-
Skip Homeier
Dr. Roy Clinton
-
Grant Williams
Major Douglas McKinnon
-
Richard Loo
Li-Chin Sung
-
James McCallion
Dr. Tremaine
-
Jay Novello
Prof. Arivello
-
Gene Raymond
Sawyer
-
Whit Bissell
Commanding General
-
James Hong
Wen Li
-
Richard Tretter
Radio Engineer
-
James Yagi
Li Kwan
-
Joseph V. Perry
Police Chief (as Joseph Perry)
-
Don C. Harvey
Military Commander (as Don Harvey)
- Mavis Neal Palmer Woman (as Mavis Neal)
-
Clarence Lung
Maj. Ho Chi-Wong
- Nancy Rennick Carol Selby Conner
- Emma Tyson Jane Darcy
- William Bramley "Baldy" Baldwin
-
Dorothy Green
Matron
- Coby Denton Sentry
-
Paul Kent
Detective
- Anne Loos Emily Radcliffe
-
Harry Ellerbe
Finley's Doctor
-
Fred Beir
Steve Crandon
- Constance Cavendish Gert 'the Bread' Evans
- George Pelling Policeman
- Martin Wolfson Dr. Herschel
- Clay Tanner Fred - Duckhunter #1
- Hal Bokar Bert - Duckhunter #2
- Lee Zimmer Carl Ford - TV Announcer
-
John Considine
Lt, Bertram Cabot
-
Maxine Stuart
Mrs. McCluskey
-
Karl Held
Capt. Joseph Reardon
-
Jack Raine
Old Man (scenes deleted)
-
Joanne Gilbert
Barbara Scott
-
C. Lindsay Workman
Dr. Anderson
- Robert Benevides James Harrison
-
John Newton
Peterson
- Jane Langley Nurse
- Matty Jordan Sentry
- Art Alisi Sergeant
-
Barry Atwater
Dr. Jonas Temple
-
Ken Renard
Caretaker
- David Garner Ralph
-
Bill Gunn
Lt. James P. Willowmore
- Sasha Harden Lt. Esra Krug
- Lillian Adams Dix's Mother
-
Lisa Mann
Krug's Governess
- Gene Darfler Warren Edgar Morley
-
Tom Palmer
Coroner
-
Noel De Souza
Capt. Fortunado
-
Edward Colmans
Servant
- Jon Silo Oswaldo
-
Stuart Lancaster
Skipper
-
Robert F. Simon
Gen. Maximillian R. Hart
- Claude Woolman Maj. Roger Hill
-
Ron Foster
Dr. Robert Richardson (as Ronald Foster)
- Hugh Langtry Chromoite
-
Gene Tyburn
Goldsmith
-
Don Ross
Haddon
- Bob Kelljan Frank Brant
-
Anthony Jochim
Dr. Mordecai Spazman
-
Dee Hartford
Mrs. Clarke
-
Marsha Hunt
Francesca Fields
- Joanna Frank Regina
-
Booth Colman
Doctor Howard Warren
-
Tony Mordente
Genero Planetta
-
Chris Warfield
Johnny
-
Richard Dawson
Oliver Fair
-
Len Lesser
Sforza Water/Power worker
- John Graham Supervisor
-
Chita Rivera
Mrs. Dame
-
Lee Kinsolving
Ethan Wechsler
-
John Milford
John Bartlett
- Bennye Gatteys Anna Bishop
-
Stephen McNally
Col. MacWilliams
-
Richard Jaeckel
Capt. Mike Doweling
-
Burt Douglas
Man
-
Simon Oakland
Empyrian
-
Robert Osterloh
General
-
John Kellogg
Major Nathan Jennings
-
Janet De Gore
Mara Matthews
-
Joe E. Tata
Deputy (as Joey Tata)
-
Peter Baldwin
Lt. Gordon Halper
-
Russell Johnson
Major Benedict
-
Yale Summers
Buddy Lyman
-
Arthur Batanides
Lt. Ken Galvin
- Arnold Merritt Tommy Shadbury
-
Mimsy Farmer
Denise Ward
-
John McLiam
Arjay Beasley
-
Alex Nicol
Gen. Lee Stocker
-
Warren Oates
Reese Fowler
-
Angela Clarke
Sueann Beasley
-
Robert Sampson
Lt. Peter Chandler
-
Hari Rhodes
Lt. Ernie Travers
- Herman Rudin Prof. Henry Lacosta
-
Richard Derr
Phillip Griffith
-
Luana Anders
Theresa Ames
-
Macdonald Carey
Roy Benjamin
-
Betsy Jones-Moreland
Julie Griffith
-
Gloria Grahame
Florida Patton
-
Richard Ney
Mr. Zeno
-
Bill Hart
Calco Galaxy Alien
-
Flip Mark
Kenny Benjamin
- Ray Kellogg Detective
-
Marion Ross
Agnes Benjamin
-
Joyce Van Patten
Rhea Cashman
-
David Opatoshu
Ralph Cashman
-
Frank Puglia
Father Fontana
-
Bert Freed
Joe Hayden
- Glenn Cannon Teenage Luminos
-
Joseph Ruskin
Collins
-
Signe Hasso
Laural Marshall
-
Barry Russo
Dr. Terrell
-
Howard Caine
Leon Chambers
-
William O'Connell
The Creature
-
Michael Ansara
Qarlo Clobregnny
-
Henry Brandon
General Crawford
-
Ralph Hart
Loren Kagan
-
Barbara Rush
Leonora Edmond
-
Jill Hill
Toni Kagan
-
Allen Jaffe
The Enemy
-
Lloyd Gough
Gen. Claiborne
- Marlowe Jensen Sgt. Berry
-
Malachi Throne
Dr. Mike
-
Catherine McLeod
Abby Kagan
-
Dean Harens
Medical Technician
-
Lawrence Montaigne
Construction
-
Julian Burton
Reporter #1
-
Joan Freeman
Elizabeth Dunn
-
Parley Baer
Dr. Bernard Stone
- Marcelle Hebert Miss Willett (as Marcel Hebert)
-
Keith Andes
Dr. Peter Wayne
- Paul Sorensen Grayson
-
James Doohan
Police Lt. Branch
- Richard Gittings TV Newscaster
- Jack Wilson Sergeant Jackson
- Mary Gregory Apartment Manager
- Barbara Wilkin Susan Wayne
-
Peter Duryea
Morrow
- Michael Falcon Elevator Operator
-
Arlene Martel
Consuelo Biros
- Owen McGiveney Night Watchman (as Owen McGivney)
-
Abraham Sofaer
Arch
-
Troy Melton
Det. Sgt. Alger
- Rex Holman Battle
-
Joe Maross
General Winston
- Steve Harris Breech
-
Ted Knight
Mr. Jerome
-
Chris Alcaide
Colonel Danvers
-
Anthony Costello
Lieutenant Bowman
-
Robert DoQui
Lieutenant Johnson
- Peter Marko Captain Lazzari
- Michael T. Mikler Captain Thomas
-
Sara Shane
Ethel Meridith
-
Marianna Hill
Nina
-
Peter Haskell
Peter Jellicoe
- Robert Sorrells Fred
-
Hugh Sanders
Sheriff Barclay
-
Mary Jackson
Mrs. McCrae
-
Peter Brocco
Professor 'Doc' Link
- Ken Drake The Judge
- Christine Matchett Evie
- Robert Nelson The Surgeon
- Robert Cinder Jessup
- William Wintersole Prof. Andrew Whitsett
-
Simon Prescott
The Guard
-
Jan Shutan
Mrs. Subiron
- Joanne Stewart Miss Steen
-
Leon Askin
Shop Superintendent
- Paulle Clark Second Nurse
- David Brady Danny Masters
-
Warren Stevens
Eric Plummer
-
Constance Towers
Laura James
-
Mike Lane
The Megasoid
-
Steven Geray
Jerichau
-
Alan Gifford
The Guide
-
Jeffrey Stone
The Cop
- Jonathan Hole The Pedestrian
-
Ivy Bethune
Miss Thorsen
- Charles H. Radilak Michael Lint
-
Sean McClory
Karl Emmet
-
Larry Ward
Keith Ellis
- Elizabeth Perry Jennifer Barham
-
Stephen Joyce
Captain Branson
-
Anthony Eisley
Col. Alex Barham
-
Douglas Kennedy
Gen. Daniel Pettit
-
Shary Marshall
Maggie O'Hara
-
Sandy Kenyon
Henry Craif
-
Martin Kosleck
Dr. Leo Hausner
-
Wesley Addy
Dr. Rahm
-
Peter Hansen
Major Locke
- Robert Chadwick Guard
-
Read Morgan
Adam Lunk
- John Caper Jr. Adam Link (voice)
- Marco López Security Guard (uncredited)
