- George Nader
- Â Dr. Glenn Barton 36 episodes, 1959-1960
- Joyce Meadows
- Â Lynn Allen / ... 5 episodes, 1959-1960
- Jack Ging
- Â Dan Wright / ... 3 episodes, 1959-1960
- Michael Keith
- Â Matt Adams / ... 3 episodes, 1960
- Michael Masters
- Â Bill Locke / ... 3 episodes, 1959-1960
- Raymond Bailey
- Â Dr. Kramer 2 episodes, 1959-1960
- Doris Fesette
- Â Edith / ... 2 episodes, 1960
- Bethel Leslie
- Â Eleanor Beck / ... 2 episodes, 1959-1960
- Myron Healey
- Â Dr. John Quirt / ... 2 episodes, 1959-1960
- Don Eitner
- Â Doug / ... 2 episodes, 1959-1960
- Joan Granville
- Â Joan Lee / ... 2 episodes, 1959-1960
- Keith Vincent
- Â Regan / ... 2 episodes, 1959-1960
- Don Kennedy
- Â Danny Ryan / ... 2 episodes, 1959-1960
- Tony Monaco
- Â Harley / ... 2 episodes, 1959-1960
- Ted Knight
- Â Dr. Herter / ... 2 episodes, 1960
- John Archer
- Â Captain Morris / ... 2 episodes, 1960
- Robert Bice
- Â Dr. Carlson 2 episodes, 1960
- Jerry Catron
- Â Ensign Fowler / ... 2 episodes, 1960
- Tyler McVey
- Â Captain Nelson Whitlow 1 episode, 1960
- Roberta Haynes
- Â Patricia Halakua 1 episode, 1960
- Sue Randall
- Â Phyllis Wright 1 episode, 1960
- Les Johnson
- Â Bill Blake 1 episode, 1960
- Byron Morrow
- Â Dean Curtiss 1 episode, 1960
- Morgan Jones
- Â Trooper Jack O'Brien 1 episode, 1960
- Alan Wells
- Â Trooper Arthur Heller 1 episode, 1960
- Fred Gabourie
- Â Roger Blanchard 1 episode, 1960
- Jerry Summers
- Â Dropper 1 episode, 1960
- Coleman Francis
- Â Police Dispatcher 1 episode, 1960
- Irvin Ashkenazy
- Â Patient 1 episode, 1960
- Jim Jacobs
- Â Test Subject 1 episode, 1960
- Julie Adams
- Â Linda Webb 1 episode, 1959
- Robert Conrad
- Â Bill Howard 1 episode, 1959
- Debra Paget
- Â Liza Dantes 1 episode, 1959
- Marcia Henderson
- Â Anne Sanders 1 episode, 1959
- James Best
- Â David Mallory 1 episode, 1959
- Whit Bissell
- Â Dr. Robert Widener 1 episode, 1959
- William Conrad
- Â Jim Harrigan 1 episode, 1959
- Paula Raymond
- Â Anne 1 episode, 1959
- Robert Clarke
- Â Dr. Wayne Robinson 1 episode, 1959
- John Marley
- Â Sam Randolph 1 episode, 1959
- Jan Shepard
- Â Dr. Anna West 1 episode, 1959
- Paul Burke
- Â Corey 1 episode, 1959
- Len Lesser
- Â Les 1 episode, 1959
- Robert J. Wilke
- Â Old Gene 1 episode, 1959
- H.M. Wynant
- Â Fred Conway 1 episode, 1959
- Jean Allison
- Â Sally Cheever 1 episode, 1959
- Dean Harens
- Â Jim Connor 1 episode, 1959
- Otto Kruger
- Â David Mumford 1 episode, 1959
- Alfred Ryder
- Â Robert Carson 1 episode, 1959
- Robert Karnes
- Â Henderson 1 episode, 1959
- Bert Remsen
- Â Ken 1 episode, 1959
- Joyce Taylor
- Â Dorrie Conway 1 episode, 1959
- John Van Dreelen
- Â Georges Bolet 1 episode, 1959
- Ed Kemmer
- Â Tom Larson 1 episode, 1959
- Phillip Terry
- Â Dr. William Ryder 1 episode, 1959
- Tracey Roberts
- Â Helen 1 episode, 1959
- Janos Prohaska
- Â Ed Carmody 1 episode, 1959
- Frank Gerstle
- Â Ed Burke 1 episode, 1959
- Lin McCarthy
- Â Paul Cheever 1 episode, 1959
- Carol Thurston
- Â Alice Barron 1 episode, 1959
- Fuzzy Knight
- Â Burro Charlie 1 episode, 1959
- John Daheim
- Â Mike Mapes 1 episode, 1959
- Alberto Morin
- Â Raymond 1 episode, 1959
- John Maxwell
- Â Dr. Warren Szold 1 episode, 1959
- Patrick Waltz
- Â Jenks 1 episode, 1959
- Danielle Aubry
- Â Suzanne Bolet 1 episode, 1959
- Logan Field
- Â Delmar Jervis 1 episode, 1959
- Nick Nicholson
- Â Jim Phillips 1 episode, 1959
- Jack Walsh
- Â Lou Brand 1 episode, 1959
- Frank Kirby
- Â Mason 1 episode, 1959
- Larry D. Mann
- Â Jim Fitzpatrick 1 episode, 1960
- Marianna Hill
- Â Ruth Tanner 1 episode, 1960
- Darryl Hickman
- Â Max Edwards 1 episode, 1960
- Karl Swenson
- Â Dr. Lindstrom 1 episode, 1960
- Hank Patterson
- Â Swede 1 episode, 1960
- Mala Powers
- Â Betty Fuller 1 episode, 1960
- Christine White
- Â Betty Knowland 1 episode, 1960
- Ann Robinson
- Â Sally Somers 1 episode, 1960
- Paul Comi
- Â Sergeant Lowery 1 episode, 1960
- Philip Ober
- Â Clifford Beck 1 episode, 1960
- John Milford
- Â Shooter McLaine 1 episode, 1960
- Olive Sturgess
- Â Sylvia Honig 1 episode, 1960
- Frank Maxwell
- Â Colonel Bill Blake 1 episode, 1960
- Miranda Jones
- Â Helen Vincent 1 episode, 1960
- Fred Beir
- Â Steve Paley 1 episode, 1960
- Edward Colmans
- Â Dr. Lopez 1 episode, 1960
- Pat McCaffrie
- Â Radio Officer 1 episode, 1960
- Adrienne Hayes
- Â Amy Brown 1 episode, 1960
- Charles Tannen
- Â George Harley 1 episode, 1960
- Robert Knapp
- Â Ryder 1 episode, 1960
- Keith Larsen
- Â John Napier 1 episode, 1960
- Eloise Hardt
- Â Madge Costain 1 episode, 1960
- Jay Douglas
- Â Graham Landry 1 episode, 1960
- Page Slattery
- Â Davis 1 episode, 1960
- Jack Harris
- Â Warden Tanner 1 episode, 1960
- Vernon Rich
- Â Judge Banner 1 episode, 1960
- Frank Biro
- Â Tamarin 1 episode, 1960
- Felipe Turich
- Â Grantina 1 episode, 1960
- Charles Alvin Bell
- Â Ed Honig 1 episode, 1960
- Miguel Landa
- Â Cartina 1 episode, 1960
- Neil Grant
- Â Big Ed Casey 1 episode, 1960
- Marshall Kent
- Â Pentagon Chief 1 episode, 1960
- Karen Scott
- Â Kitty 1 episode, 1960
- Maureen Leeds
- Â Gina Reed 1 episode, 1960
- Charles Keane
- Â Bill Andrews 1 episode, 1960
- Bern Bassey
- Â Darcey 1 episode, 1960
- Donald Gamble
- Â Maxey 1 episode, 1960
- Mike Keene
- Â Colonel 1 episode, 1960
- Arvid Nelson
- Â Charlie Burke 1 episode, 1960
- Robert Gothie
- Â Buzz Harmon 1 episode, 1960
- Jack Hilton
- Â Scott 1 episode, 1960
- Richard Jeffries
- Â Radio Operator 1 episode, 1960
- Robert Mercy
- Â Arejevo 1 episode, 1960
- Dean Harvey
- Â Donaldson 1 episode, 1960
- Andy Thompson
- Â Colonel Pierce 1 episode, 1960
- Chuck Parkerson
- Â Announcer 1 episode, 1960
- Ethel Jensen
- Â Joan Gillespie 1 episode, 1960
- Wayne Mallory
- Â Smitty (uncredited) 1 episode, 1959
- Howard McLeod
- Â Radio Operator (uncredited) 1 episode, 1960
