- Truman Bradley
- Â Narrator / ... 78 episodes, 1955-1957
- Michael Fox
- Â Dr. Franklin / ... 7 episodes, 1955-1956
- Marshall Thompson
- Â Dr. Albert Neville / ... 7 episodes, 1955-1956
- Peter Hansen
- Â Dr. Dan Scott / ... 6 episodes, 1955-1957
- Walter Kingsford
- Â Dean Howard Menges / ... 6 episodes, 1955-1957
- Rachel Ames
- Â Amy Kern / ... 6 episodes, 1955-1957
- Charles Maxwell
- Â Agent John Randall / ... 5 episodes, 1955-1957
- Bill Williams
- Â Bill Twining / ... 5 episodes, 1955-1957
- Bruce Bennett
- Â Dr. Hugh Bentley / ... 5 episodes, 1955-1957
- Arthur Franz
- Â Dr. Jeff Conover / ... 5 episodes, 1955-1956
- Tom Anthony
- Â Fluoroscope Man / ... 1 episode, 1955-1957
- Dick Foran
- Â Dr. Don Stewart / ... 4 episodes, 1956
- Donald Curtis
- Â Dr. Fred Garner / ... 4 episodes, 1955-1956
- Jean Byron
- Â Ada March / ... 4 episodes, 1955-1956
- Kristine Miller
- Â Alma Ford / ... 4 episodes, 1955-1957
- Cyril Delevanti
- Â Dr. Kenneth White / ... 4 episodes, 1955-1957
- Morris Ankrum
- Â Campbell / ... 4 episodes, 1955-1956
- Tom McKee
- Â Bill / ... 4 episodes, 1955-1956
- John Mitchum
- Â Detective Sergeant / ... 4 episodes, 1955-1956
- William Vaughn
- Â John Scott / ... 4 episodes, 1956-1957
- Michael Garth
- Â Charles Irwin / ... 4 episodes, 1955-1956
- Paul Hahn
- Â Johnson / ... 4 episodes, 1955-1956
- Hank Patterson
- Â George / ... 4 episodes, 1955-1957
- Paul Guilfoyle
- Â Alien / ... 3 episodes, 1956
- Skip Homeier
- Â Bill Reynolds / ... 3 episodes, 1955-1956
- Marilyn Erskine
- Â Dr. Susan Calvin / ... 3 episodes, 1955-1956
- William Ching
- Â Dr. George Stoneham / ... 3 episodes, 1955-1956
- Ray Collins
- Â Dr. Milton Otis / ... 3 episodes, 1955-1956
- Christopher Dark
- Â Dr. Keith Brandon / ... 3 episodes, 1955-1956
- Whit Bissell
- Â Dr. Maxwell Carnaven / ... 3 episodes, 1956
- Bruce Wendell
- Â Al Mitchell / ... 3 episodes, 1956
- Jan Shepard
- Â Joan Crane / ... 3 episodes, 1955-1957
- John Stephenson
- Â Dr. Brewster / ... 3 episodes, 1955-1956
- Bradford Jackson
- Â Carl Eberhardt / ... 3 episodes, 1955-1956
- George Eldredge
- Â Comdr. Stanley / ... 3 episodes, 1955-1956
- Mack Williams
- Â Dr. Johnston / ... 3 episodes, 1955-1956
- Gene Roth
- Â Dr. Lawrence--Gray-Haired Scientist / ... 3 episodes, 1956
- John Eldredge
- Â Carter B. Page / ... 3 episodes, 1956
- John Doucette
- Â Col. Stewart / ... 3 episodes, 1955-1956
- Thomas Browne Henry
- Â Dr. Haley / ... 3 episodes, 1956
- David Alpert
- Â Dr. Porter Owen / ... 3 episodes, 1955-1956
- Freddy Ridgeway
- Â Bobby Avitor / ... 3 episodes, 1956-1957
- DeForest Kelley
- Â Captain Hall, M.D. / ... 3 episodes, 1955-1956
- Dabbs Greer
- Â Arthur Kern / ... 3 episodes, 1955-1956
- Paul Birch
- Â Dr. Raymond Michaels / ... 3 episodes, 1955-1956
- Elizabeth Slifer
- Â Girls' Dorm Supervisor / ... 3 episodes, 1955-1957
- Arthur Marshall
- Â Frank / ... 3 episodes, 1956-1957
- Bruce Payne
- Â Dr. Hunter / ... 3 episodes, 1956-1957
- Ruth Hussey
- Â Bernice Knight / ... 2 episodes, 1955-1956
- Gene Barry
- Â Capt. John Forester / ... 2 episodes, 1955
- Zachary Scott
- Â Dr. Erwin Bach / ... 2 episodes, 1955
- Dane Clark
- Â Dr. Ken Donaldson / ... 2 episodes, 1955
- Otto Kruger
- Â Dr. Emanuel M. Hall / ... 2 episodes, 1955
- Virginia Bruce
- Â Dr. Myrna Griffin / ... 2 episodes, 1955
- Edmund Gwenn
- Â Dr. Lorenz / ... 2 episodes, 1955
- Vincent Price
- Â Dr. Philip Redmond / ... 2 episodes, 1956
- Gene Lockhart
- Â Dr. Elwood Dove / ... 2 episodes, 1956
- Barbara Hale
- Â Nancy Stanton / ... 2 episodes, 1955
- John Howard
- Â Dr. Paul Novak / ... 2 episodes, 1955
- John Archer
- Â Police Lt. Mike Redding / ... 2 episodes, 1955-1956
- Ludwig Stössel
- Â Dr. Richard Wissman / ... 2 episodes, 1955-1956
- Doris Dowling
- Â Celia Jamison / ... 2 episodes, 1955
- Steve Brodie
- Â Dr. Robert Barton / ... 2 episodes, 1955
- Diana Douglas
- Â Elaine Conover / ... 2 episodes, 1956
- Lisa Gaye
- Â Barbara Arnold / ... 2 episodes, 1955-1957
- Beverly Garland
- Â Katherine Kerston / ... 2 episodes, 1955-1956
- Robin Short
- Â Dr. Paul Kincaid / ... 2 episodes, 1955-1956
- Warren Stevens
- Â Prof. Richard Sheldon / ... 2 episodes, 1955
- Ted de Corsia
- Â Detective Sgt. Cox / ... 2 episodes, 1955
- Virginia Christine
- Â Dr. Eleanor Ballard / ... 2 episodes, 1956
- Kenneth Tobey
- Â Frank Davis / ... 2 episodes, 1955-1956
- Joyce Holden
- Â Alma Stark / ... 2 episodes, 1955-1956
- Lowell Gilmore
- Â Ballard / ... 2 episodes, 1955-1956
- Ellen Drew
- Â Diane Turner / ... 2 episodes, 1955
- Susan Cummings
- Â Ellen Barton / ... 2 episodes, 1956
- Christine Larson
- Â Nina Keller / ... 2 episodes, 1955-1956
- Charles Wagenheim
- Â Ed Gorman / ... 2 episodes, 1955-1956
- Robert Griffin
- Â Ralph Scott / ... 2 episodes, 1955-1956
- Barry Froner
- Â Gene Willard / ... 2 episodes, 1955-1956
- Robert F. Simon
- Â Police Capt. Damon / ... 2 episodes, 1955
- Harlan Warde
- Â Dr. Lindstrom / ... 2 episodes, 1956
- Sydney Mason
- Â Dr. Steve Dorian / ... 2 episodes, 1956
- Frank Gerstle
- Â Col. Eugene Beckwith / ... 2 episodes, 1955-1956
- Russ Conway
- Â Charles S. Lyons / ... 2 episodes, 1955-1956
- Anthony Eustrel
- Â Galleon / ... 2 episodes, 1955-1956
- Larry Hudson
- Â Dick Ganz / ... 2 episodes, 1955-1956
- Douglas Henderson
- Â Dr. Avery / ... 2 episodes, 1955
- Jonathan Hale
- Â Dr. Hugo Milton / ... 2 episodes, 1955
- William Henry
- Â Dean Collins / ... 2 episodes, 1956
- Than Wyenn
- Â Dr. Herbert / ... 2 episodes, 1956
- Doug Wilson
- Â Doug Hinkle / ... 2 episodes, 1956
- James Seay
- Â James Russell / ... 2 episodes, 1955-1957
- Charles Cane
- Â Frank Jenkins / ... 2 episodes, 1955
- Fred Coby
- Â Capt. Landry / ... 2 episodes, 1956
- Riza Royce
- Â Mrs. Horton / ... 2 episodes, 1956
- Phil Arnold
- Â Chet Arnold / ... 2 episodes, 1955-1956
- Jason Johnson
- Â Professor Adams / ... 2 episodes, 1956
- Robert Weston
- Â Dr. Bane / ... 2 episodes, 1956
- Michael Winkelman
- Â Kenny Guild / ... 2 episodes, 1955
- Lonie Blackman
- Â Joyce McLane / ... 2 episodes, 1956
- John Bryant
- Â Lieutenant / ... 2 episodes, 1955
- George Barrows
- Â Adam / ... 2 episodes, 1956
- Kay Faylen
- Â Alice Kinder / ... 2 episodes, 1955-1956
- James Waters
- Â Bailiff / ... 2 episodes, 1955-1956
- Bill Erwin
- Â Dr. Harold Lewis / ... 2 episodes, 1956
- Robert Sherman
- Â Dr. Frederick Ryner / ... 2 episodes, 1956
- Jim Sheldon
- Â Capt. Landry's Assistant / ... 2 episodes, 1956
- George Meader
- Â Dr. Albert Finch / ... 2 episodes, 1955
- Carol Thurston
- Â Ann Brander / ... 2 episodes, 1955
- Toni Carroll
- Â Brunette Nurse / ... 2 episodes, 1955
- Tom Bernard
- Â Elton Crane / ... 2 episodes, 1955-1956
- Peter Davis
- Â Duncan / ... 2 episodes, 1955-1956
- Leo Needham
- Â Bishop / ... 2 episodes, 1956
- Troy Melton
- Â Joe 2 episodes, 1956-1957
- Basil Rathbone
- Â Dr. Victor Berenson 1 episode, 1955
- George Brent
- Â Sam Gilmore 1 episode, 1955
- William Talman
- Â Norman Conway 1 episode, 1955
- Kent Smith
- Â Professor Alex Bondar 1 episode, 1955
- Pat O'Brien
- Â Dr. Walter Arnold 1 episode, 1955
- Macdonald Carey
- Â Dr. Lee Seward 1 episode, 1955
- James Craig
- Â Capt. John Perry 1 episode, 1955
- Don DeFore
- Â Al Brown 1 episode, 1955
- William Bishop
- Â Mel Wingate 1 episode, 1955
- William Lundigan
- Â Maj. Fred Gunderman 1 episode, 1955
- Richard Arlen
- Â Dr. Osbourne 1 episode, 1955
- Adolphe Menjou
- Â Dr. Elliott Harcourt 1 episode, 1955
- Keefe Brasselle
- Â Edward Burton 1 episode, 1955
- June Lockhart
- Â Eve Patrick 1 episode, 1956
- Wayne Morris
- Â Capt. Steve Conway 1 episode, 1956
- Howard Duff
- Â Dr. Tom Mathews 1 episode, 1956
- Victor Jory
- Â Det. Lt. William Kiel 1 episode, 1956
- Percy Helton
- Â Dr. John Hustead 1 episode, 1957
- Charles Winninger
- Â Grandpa Scott 1 episode, 1957
- Marie Windsor
- Â Nell Brown 1 episode, 1955
- William Schallert
- Â Mr. Thomas 1 episode, 1955
- Richard Erdman
- Â Seth Turner 1 episode, 1955
- Virginia Grey
- Â Sheila Dunlap 1 episode, 1955
- Lynn Bari
- Â Verda Wingate 1 episode, 1955
- Hugh Beaumont
- Â Dr. Guy Stanton 1 episode, 1955
- Gene Evans
- Â Bud Porter 1 episode, 1955
- Audrey Totter
- Â Ellie Ferguson 1 episode, 1955
- John Abbott
- Â John Bowers 1 episode, 1955
- Marguerite Chapman
- Â Jean Forester 1 episode, 1955
- Osa Massen
- Â Julie Bondar 1 episode, 1955
- Richard Eyer
- Â Timmy Daniels 1 episode, 1955
- John Qualen
- Â Prof. Samuel Avery 1 episode, 1955
- Joan Vohs
- Â Kyra Zelas 1 episode, 1955
- Walter Coy
- Â Warren Keath 1 episode, 1955
- Jess Barker
- Â Dr. Jeffries 1 episode, 1955
- Charles Evans
- Â Ed Tratnor 1 episode, 1955
- Martin Milner
- Â Britt 1 episode, 1956
- Philip Ober
- Â Prof. Carl Schneider 1 episode, 1956
- Stafford Repp
- Â Prof. Van Doorne--Scientist with Glasses 1 episode, 1956
- Ross Elliott
- Â Howard Evans 1 episode, 1956
- Ed Kemmer
- Â Joe Castle Jr. 1 episode, 1956
- Jacqueline Holt
- Â Jean Rudman 1 episode, 1956
- Toni Gerry
- Â Nina Barlow 1 episode, 1956
- Joan Sinclair
- Â Grace Laurie 1 episode, 1956
- Bonita Granville
- Â Barbara Cameron 1 episode, 1957
- Vera Miles
- Â Dr. Jan Corey 1 episode, 1955
- Phyllis Coates
- Â Karen Sheldon 1 episode, 1955
- Carl 'Alfalfa' Switzer
- Â Pete 1 episode, 1955
- Jean Willes
- Â Virginia Kincaid 1 episode, 1955
- Craig Stevens
- Â Dr. David Brooks 1 episode, 1955
- Nancy Gates
- Â Lois Strand 1 episode, 1955
- Robert H. Harris
- Â Dr. Robinson 1 episode, 1955
- Margaret Field
- Â Julie Tyler 1 episode, 1955
- Biff Elliot
- Â Ed Garrett 1 episode, 1955
- Tom Drake
- Â Dr. James Everett 1 episode, 1955
- Arleen Whelan
- Â Evelyn Raleigh 1 episode, 1955
- Tol Avery
- Â Prof. Buck Weaver 1 episode, 1955
- Louis Jean Heydt
- Â Lt. Col. Van Dyke 1 episode, 1955
- Juney Ellis
- Â Mrs. Peterson 1 episode, 1955
- Harvey Stephens
- Â Henry Stark 1 episode, 1955
- Peter Adams
- Â Dr. Clements 1 episode, 1955
- Tony Barrett
- Â Police Commandante 1 episode, 1955
- Carlyle Mitchell
- Â Gen. Kenyon 1 episode, 1955
- Joyce Jameson
- Â Nina Lasalle 1 episode, 1956
- William Phipps
- Â Dr. Stockton 1 episode, 1956
- Francis McDonald
- Â Prof. Bernini 1 episode, 1956
- Claudia Barrett
- Â Jean Richardson 1 episode, 1956
- Aline Towne
- Â Barbara Davis 1 episode, 1956
- Nancy Hale
- Â Ruth Taney 1 episode, 1956
- Tyler McVey
- Â Sheriff Barney Cole 1 episode, 1956
- Julian Rivero
- Â Padre Xavier 1 episode, 1956
- Charles Victor
- Â Ed Martin 1 episode, 1956
- Wheaton Chambers
- Â Prof. Van Kamp 1 episode, 1956
- Gloria Marshall
- Â Jill Page 1 episode, 1956
- Brad Trumbull
- Â Dr. Mark Cook 1 episode, 1956
- Harlow Wilcox
- Â Karl Krauss 1 episode, 1956
- Robert Shield
- Â Dr. Robert Werth 1 episode, 1956
- Ann Lilliquist
- Â Rosellen Avitor 1 episode, 1956
- Keith Richards
- Â Clyde Bishop 1 episode, 1957
- Sydney Smith
- Â Dr. Franklin 1 episode, 1957
- Raymond Bailey
- Â Dr. Smiley 1 episode, 1955
- Phillip Pine
- Â Dr. Norman Heller 1 episode, 1955
- Adam Williams
- Â Lt. Frank Buchanan 1 episode, 1955
- Robert Clarke
- Â Frank 1 episode, 1955
- Barney Phillips
- Â Dr. Hoster 1 episode, 1955
- Elizabeth Patterson
- Â Hannah 1 episode, 1955
- Charles Meredith
- Â Mr. Lyman 1 episode, 1955
- Virginia Hunter
- Â Paula Kennedy 1 episode, 1955
- Gary Marshall
- Â Bobby Tyler 1 episode, 1955
- Steve Pendleton
- Â Dr. Briggs 1 episode, 1955
- Irving Mitchell
- Â Superintendent 1 episode, 1955
- Herbert Heyes
- Â Governor 1 episode, 1955
- Peggy O'Connor
- Â Ann Heller 1 episode, 1955
- Elmore Vincent
- Â Charlie 1 episode, 1955
- Clarence Lung
- Â Dr. Lee Suyin 1 episode, 1955
- Andrew Glick
- Â Terry Jamison 1 episode, 1955
- Tom De Graffenreid
- Â Police Officer 1 episode, 1955
- Charles Herbert
- Â Tommy Parker 1 episode, 1956
- Robert Bice
- Â Coach Shane 1 episode, 1956
- Tristram Coffin
- Â Joseph Castle Sr. 1 episode, 1956
- Julie Van Zandt
- Â Wanda 1 episode, 1956
- Charles Smith
- Â Tommy Cooper 1 episode, 1956
- Paul Fierro
- Â Tawa 1 episode, 1956
- Don Brodie
- Â Ward Baxter 1 episode, 1956
- Herbert Lytton
- Â Dr. Lloyd 1 episode, 1956
- Leonard Mudie
- Â Dr. John Bellow 1 episode, 1956
- Michael Granger
- Â Larry Evans 1 episode, 1956
- David Hillary Hughes
- Â Dr. Robert March 1 episode, 1956
- Helen Mowery
- Â Alma Willard 1 episode, 1956
- Mel Ruick
- Â Dr. Selwyn Frake 1 episode, 1956
- Byron Kane
- Â Dr. Brady 1 episode, 1956
- Voltaire Perkins
- Â Dr. Jim Woodward 1 episode, 1956
- Darlene Albert
- Â Elaine 1 episode, 1956
- George Becwar
- Â Hospital Doctor 1 episode, 1956
- Lyle Talbot
- Â Gen. Dothan 1 episode, 1957
- Dan White
- Â Bud 1 episode, 1957
- William Hudson
- Â Ken Waring 1 episode, 1957
- Herbert Rudley
- Â Mr. McAdoo 1 episode, 1955
- Booth Colman
- Â Dr. McLeod 1 episode, 1955
- John Pickard
- Â Sheriff Carson 1 episode, 1955
- Stanley Andrews
- Â Sheriff Edgar Simpson 1 episode, 1955
- Madge Kennedy
- Â Mrs. Canby 1 episode, 1955
- Basil Ruysdael
- Â Prof. Samuel Carson 1 episode, 1955
- Paul Dubov
- Â Lt. Carruthers 1 episode, 1955
- Ray Bennett
- Â Deputy Charlie 1 episode, 1955
- Emerson Treacy
- Â Dr. Heineman 1 episode, 1955
- Mary Munday
- Â Barbara Daman 1 episode, 1955
- Art Lewis
- Â Sgt. Cornelius Cooper 1 episode, 1955
- Alan Reynolds
- Â Police Officer 1 episode, 1955
- Joseph Forte
- Â Prof. Spaulding 1 episode, 1955
- Richard Flato
- Â Dr. Ahmed Abdullah 1 episode, 1955
- William Fawcett
- Â Mort Woods 1 episode, 1956
- Tom Pittman
- Â Willis 1 episode, 1956
- John Dennis
- Â Dr. Charles Hayes 1 episode, 1956
- Lee Millar
- Â Ned 1 episode, 1956
- Nadine Ashdown
- Â Susan Avitor 1 episode, 1956
- Mauritz Hugo
- Â Hotel Manager 1 episode, 1956
- Tom Dillon
- Â File Clerk 1 episode, 1956
- Jean Harvey
- Â Hotel Maid 1 episode, 1956
- Gretchen Thomas
- Â Neville's Mother 1 episode, 1956
- Guy Rennie
- Â Sam Gilman 1 episode, 1956
- Alfred Linder
- Â Pandit Chandra Singh 1 episode, 1956
- Opal Euard
- Â Martha Hewitt 1 episode, 1956
- Irene Bolton
- Â Selma Sanford 1 episode, 1956
- Terry Frost
- Â Deputy Terry 1 episode, 1957
- Frances Pasco
- Â Mrs. Garby 1 episode, 1957
- Douglas Kennedy
- Â Col. R.J. Barton 1 episode, 1955
- John Alvin
- Â Dr. Lee Thomas 1 episode, 1955
- Dennis Moore
- Â Robbery Victim 1 episode, 1955
- Hal K. Dawson
- Â Silas Barker 1 episode, 1955
- Isa Ashdown
- Â Girl 1 episode, 1955
- Everett Glass
- Â Dr. Millard Townsend 1 episode, 1955
- Ted Thorpe
- Â Houseboy 1 episode, 1955
- Jackie Blanchard
- Â Nurse 1 episode, 1955
- Madge Cleveland
- Â Mrs. LeBlanc 1 episode, 1955
- Marilyn Saris
- Â Ruth 1 episode, 1955
- Patrick Miller
- Â Joe 1 episode, 1955
- Bill Stout
- Â TV Announcer 1 episode, 1955
- Frank Hanley
- Â Dr. Hemingway 1 episode, 1955
- Hal Forrest
- Â Fleming 1 episode, 1955
- Lisa Davis
- Â Alice Cooper 1 episode, 1956
- Rhodes Reason
- Â Sean Daley 1 episode, 1956
- Steven Ritch
- Â Dr. Richard Patterson 1 episode, 1956
- Ken Christy
- Â Bill 1 episode, 1956
- Glenn Dixon
- Â Pat Johnson 1 episode, 1956
- Edward Earle
- Â Dr. Joel Kerwin 1 episode, 1956
- Gregory Moffett
- Â Jimmy Stark 1 episode, 1956
- Elizabeth Flournoy
- Â Elinor Lopert 1 episode, 1956
- Gloria Clark
- Â Ruth 1 episode, 1956
- Bob Wehling
- Â Henry Mason 1 episode, 1956
- Bill Welsh
- Â TV Announcer 1 episode, 1956
- George Leigh
- Â Gen. Walter Rayburn 1 episode, 1956
- Billy Griffith
- Â Old Man 1 episode, 1956
- Thomas Anthony
- Â Air Controller 1 episode, 1956
- Joe Colbert
- Â Dr. Phil Avery 1 episode, 1956
- David Dwight
- Â Waiter 1 episode, 1956
- Lewis Auerbach
- Â Don Cater 1 episode, 1956
- Steve Mitchell
- Â Denby 1 episode, 1957
- George Douglas
- Â Dr. Jorgenson 1 episode, 1957
- Ruta Lee
- Â Student 1 episode, 1955
- Beverly Washburn
- Â Laurie Kern 1 episode, 1955
- Clark Howat
- Â Capt. Boyce 1 episode, 1955
- Phyllis Cole
- Â Nurse 1 episode, 1955
- Patsy Parsons
- Â Eileen Herrick 1 episode, 1955
- Howard Wright
- Â Dr. Miller 1 episode, 1955
- Gordon Wynn
- Â Doctor 1 episode, 1955
- Craig Duncan
- Â Robb 1 episode, 1955
- Lynn Cartwright
- Â Desk Nurse 1 episode, 1956
- Eve McVeagh
- Â Ann Page 1 episode, 1956
- Melinda Casey
- Â Alice 1 episode, 1956
- Patricia Donahue
- Â Nurse Sloan 1 episode, 1956
- Julian Burton
- Â Young Man 1 episode, 1956
- Joseph Hamilton
- Â Dr. John Bergstrom 1 episode, 1956
- Esther Furst
- Â Nurse 1 episode, 1956
- Ruth Perrott
- Â Mary Kerwin 1 episode, 1956
- Paul Harber
- Â Jennings 1 episode, 1956
- Gordon Barnes
- Â Chaney 1 episode, 1956
- Alan Paige
- Â Worker 1 episode, 1956
- Bhupesh Guha
- Â Assassin 1 episode, 1956
- Virginia Pohlman
- Â Nora Lester 1 episode, 1956
- Dale Hutchinson
- Â Ed Clayborn 1 episode, 1956
- Eddie Gallagher
- Â Al Hall 1 episode, 1956
- John Zaremba
- Â FCC Agent Brummer 1 episode, 1957
- Theodore Lehmann
- Â Mr. Jackson 1 episode, 1957
- Kim Winona
- Â Mme. DeCosa 1 episode, 1957
- James Westerfield
- Â Dr. Charles Conselman 1 episode, 1955
- Addison Richards
- Â Howie Stevens 1 episode, 1955
- Robert Carson
- Â Capt. Ferguson 1 episode, 1955
- Will J. White
- Â Sergeant 1 episode, 1955
- Pierce Lyden
- Â Anesthetist 1 episode, 1955
- John Phillips
- Â Sonar Operator 1 episode, 1955
- Elsie Baker
- Â Cleaning Lady 1 episode, 1955
- Tom Daly
- Â Dr. Markell 1 episode, 1955
- Amanda Webb
- Â Thelma Marlow 1 episode, 1955
- Helen Van Camp
- Â Maid 1 episode, 1955
- Elizabeth Whitney
- Â Cleaning Woman 1 episode, 1955
- George Crise
- Â Student 1 episode, 1955
- Victoria Fox
- Â British Institute Receptionist 1 episode, 1955
- Burt Mustin
- Â Mr. Stevenson 1 episode, 1956
- Anna Navarro
- Â Nurse 1 episode, 1956
- Dolores Michaels
- Â Desk Clerk 1 episode, 1956
- Helen Jay
- Â Nurse 1 episode, 1956
- Maureen Cassidy
- Â Judy 1 episode, 1956
- Larry Kerr
- Â Fielding 1 episode, 1956
- Charles Postal
- Â Dr. Leonard Mills 1 episode, 1956
- Renee Patryn
- Â Chorus Girl 1 episode, 1956
- George Gilbreth
- Â Bob Wilson -- Code Unscrambler 1 episode, 1957
- Marjorie Bennett
- Â Witness 1 episode, 1955
- George E. Mather
- Â Radio Operator 1 episode, 1955
- Mark Lowell
- Â Switchboard Operator 1 episode, 1955
- Vicki Bakken
- Â Sylvia Weiss 1 episode, 1955
- Bing Russell
- Â Radio Operator 1 episode, 1956
- Paul Lukather
- Â Electronics Expert 1 episode, 1956
- Olan Soule
- Â Mr. Wilkins 1 episode, 1956
- Don Eitner
- Â Henry Richards 1 episode, 1956
- George Pembroke
- Â Dr. Benton 1 episode, 1956
- Cynthia Baer
- Â Hotel Receptionist 1 episode, 1956
- Hal Hoover
- Â Sloan 1 episode, 1956
- Peter Dunne
- Â Carr 1 episode, 1956
- George Huerta
- Â Boy Finding Dog 1 episode, 1956
- Hugh Lawrence
- Â Agent Ross 1 episode, 1957
- Roland Varno
- Â Scientist 1 episode, 1956
- Julie Jordan
- Â Secretary 1 episode, 1956
- Sam Scar
- Â Waiter 1 episode, 1956
- Ken Drake
- Â Malcolm Douglas 1 episode, 1955
- Charlotte Lawrence
- Â Telephone Operator 1 episode, 1956
- Beverly Barnes
- Â Unidentified Role 1 episode, 1956
- Robert Nelson
- Â Willard Hicks 1 episode, 1955
- Paul Peters
- Â Guard #1 1 episode, 1956
- Robert S. Richardson
- Â Self 1 episode, 1955
- Andrew Roud
- Â Bit / ... (uncredited) 3 episodes, 1956-1957
- Ann Howard
- Â Nurse / ... (uncredited) 2 episodes, 1955-1956
- Frank Hunt
- Â Man at Lunch Stand / ... (uncredited) 2 episodes, 1955-1956
- Grant Davis
- Â Bit / ... (uncredited) 2 episodes, 1955-1956
- Heinie Conklin
- Â Janitor (uncredited) 1 episode, 1955
- Joseph La Cava
- Â FBI Man (uncredited) 1 episode, 1955
- Ben Pollock
- Â Dr. Kennedy (uncredited) 1 episode, 1955
- Morgan Windbiel
- Â Lester (uncredited) 1 episode, 1955
- Gail Robinson
- Â Milkman (uncredited) 1 episode, 1955
- Lorraine Knight
- Â Teletype Secretary (uncredited) 1 episode, 1955
- Dallas Boyd
- Â Henry (uncredited) 1 episode, 1955
- Gus Hyland
- Â Maintenance Man (uncredited) 1 episode, 1955
- Bob Peterson
- Â Uniformed Policeman (uncredited) 1 episode, 1955
- Bek Nelson
- Â Assistant in Truman Bradley Intro (uncredited) 1 episode, 1956
- Harry Wilson
- Â Pedestrian (uncredited) 1 episode, 1956
- Ralph Helfer
- Â Ralph (uncredited) 1 episode, 1956
- Charles Irwin
- Â Undetermined Role (uncredited) 1 episode, 1956
- Joe Zboran
- Â Bit (uncredited) 1 episode, 1956
- Joe DeAngelo
- Â Gas Pumper / ... (uncredited) 1 episode, 1956
- Jack Krupnick
- Â Security Guard (uncredited) 1 episode, 1956
- Stewart Newmark
- Â Bit (uncredited) 1 episode, 1956
- Murray Yeats
- Â Bit (uncredited) 1 episode, 1956
- Leonard St. Lee
- Â Photographer (uncredited) 1 episode, 1956
- Rod De Medici
- Â Man (uncredited) 1 episode, 1956
- Duke Seba
- Â Bit (uncredited) 1 episode, 1956
- Leonard St. Leo
- Â Lab Assistant (uncredited) 1 episode, 1957
