- Cloris Leachman - Dorothy Hummer
- Arthur Franz - Det. Sgt. Sol Moss
- Susan Tyrrell - Phyllis Freuchen
- Lynn Loring - June
- Noreen Corcoran - Cathy Williams
- Richard Eyer - Jeff Yorker
- Robert Walker Jr. - Dick Sullivan
- Argentina Brunetti - Mrs. Acero
- Anna Lee - Mrs. Woodridge
- Kathryn Hays - Jenny Peterson
- Frankie Avalon - David Muller
- Cheryl Holdridge - Betty
- Peter Breck - Dr. Ted Dietrich
- Jimmy Hawkins - Peter Beatty
- Milton Selzer - Ted Canford
- Tige Andrews - Lt. Charles Green
- Tony Bill - Chris Herrod
- Marta Kristen - Gail Andrews
- Pat Harrington, Jr. - Thomas Kelly
- Joey Heatherton - Holly Metcalfe
- Jeanne Bal - Jean Pagano
- Leo Durocher - Self
- Jeanne Cooper - Louise Sargent
- Les Tremayne - Bates
- Bert Freed - Lorimer
- Simon Oakland - Carl Green
- Lois Nettleton - Jean Corcoran
- Diane Ladd - Mrs. Otis
- Macdonald Carey - Mr. Edwards
- Tisha Sterling - Myra
- Phyllis Hill - Doris O'Neal
- Burt Brinckerhoff - Joe Keenan
- Geraldine Brooks - Claire Andreas
- Tommy Kirk - Tod Seaton
- Heather Angel - Alfreida White
- Donald Harron - Bud Walker
- K.T. Stevens - Holly Bradwell
- Nehemiah Persoff - Henry Selkirk
- Michael J. Pollard - Go-Go Reader
- Bobby Diamond - Gus
- Frank Maxwell - Douglas Morgan Sr.
- Claudine Longet - Shahri Javid
- Vera Miles - Sister Gervaise
- Kevin McCarthy - Mr. Williams
- Diane Baker - Mildred Chase
- James Flavin - Fire Chief Hawkins
- Hermione Baddeley - Miss Mumsley
- Robert Ellenstein - Philip Goddard
- Joyce Van Patten - Avis Brown
- Ford Rainey - Eason
- Tommy Rettig - Frank
- Herschel Bernardi - Mr. Otis
- Frank Albertson - Jim O'Neal
- Heather North - Felicia
- Frank Silvera - Andy Towner
- Paul Mantee - Hal Williams
- Bonnie Franklin - Sally
- Harvey Lembeck - Vic Rizzo
- Beverly Washburn - Ruth
- Beverly Washburn - Edith
- Edward Mulhare - Rand Hardy
- Don 'Red' Barry - Anthony Gallo
- Mark Slade - Lee Manson
- David Sheiner - Paul Webb
- Martin Landau - Victor Rand
- Martin Landau - Robert Coolidge
- Lillian Gish - Maude Phipps
- Kim Darby - Judy Wheeler
- Kim Darby - Julie Dean
- Tom Drake - Powell
- Pat Crowley - Ariel Wilder
- Tommy Sands - Ray Wilson
- Tommy Sands - Gary Lewin
- Toni Basil - Randy
- Denver Pyle - Brill
- Don Grady - Hank Nelby
- Don Grady - Joey Carter
- Royal Dano - Mr. Metcalfe
- Virginia Christine - Mrs. Payne
- Shelley Fabares - Dani Cooper
- Burgess Meredith - Principal Martin Woodridge
- Allan Hunt - Jerry Donan
- Allan Hunt - Dick Elerton
- Walter Brooke - Jess Capper
- Harold Gould - Joe Garson
- Phillip Terry - Mr. Burr
- Phillip Terry - Lewis Clinton
- Katharine Ross - Mrs. Bellway
- Edward Andrews - Whittier
- Ed Asner - Harmon Stern
- Ed Asner - Paul Berg
- David White - Ralph Morrison
- Brooke Bundy - Patrice Morgan
- Brooke Bundy - Carol Walker
- Brooke Bundy - Shirley
- Alley Mills - Billie
- Marion Ross - Nurse Bromfield
- Mabel Albertson - Mrs. Ring
- Peggy Lipton - Selma
- Mike Kellin - Cohen
- Mike Kellin - Lester Lewin
- Juanita Moore - Ellen Towner
- Sherry Jackson - Cathy Ferguson
- Tony Dow - George
- Tony Dow - George Scheros
- Tony Dow - United States - United Nations Assembly
- Tony Dow - Mike Kenyon
- Rusty Lane - Lieutenant Comerford
- June Lockhart - Mrs. Nelby
- Eddie Albert - Charlie O'Rourke
- Howard Duff - Joe Stillman
- Lyle Bettger - Brigham
- Tim McIntire - Chris
- Tim McIntire - Lee Daragh
- Edmon Ryan - Ralph Wheeler
- Whit Bissell - Karl Bellini
- Joe Mantell - Jack Parkson
- Ross Elliott - Roy Daniels
- Ross Elliott - Millard Wright
- Alexander Scourby - George Andreas
- Alexander Scourby - Allen Ferguson
- Patricia Morrow - Abigail
- Patricia Morrow - Gloria
- Patricia Morrow - Sandra
- Malachi Throne - Tom Norson
- Malachi Throne - Frank Czarnecki
- Malachi Throne - Medford
- Barbara Barrie - Mary Smith
- Frances Reid - Elsie Wheeler
- Frank Marth - Mr. Gorman
- Lurene Tuttle - Mrs. Grange
- Harry Townes - Frank Deaver
- Harry Townes - Walter MacTell
- Norman Fell - Barney Sanders
- Walter Koenig - Paul Ryder
- Walter Koenig - Alexsei Dubov
- Walter Koenig - Jim Carsey
- Noah Keen - Dr. Manzoni
- Johnny Crawford - JoJo Rizzo
- Johnny Crawford - USSR - United Nations Assembly
- Claude Akins - Lou Myerson
- Alexander Lockwood - Collins
- Karl Swenson - Mr. Haskell
- Beau Bridges - Pat Knowland
- Beau Bridges - Jay Bartlett
- Charles Lampkin - Robert Desmond
- Don Mitchell - Chuck
- Julie Sommars - Ellen Cable
- Robert Culp - Frank Menlow
- Rita Lynn - Edith MacTell
- James Houghton - Jim
- Tom Lowell - Carl Edwards
- Peter Helm - President - United Nations Assembly
- Peter Helm - Douglas Morgan Jr.
- Peter Helm - Verne
- Robert Random - Joey Caldwell
- Robert Random - Phil
- Robert Random - Eddie
- Eddie Applegate - Swish Lehr
- Patricia McNulty - Mrs. Rita Donzie
- E. Jack Neuman
- Leonard Freeman
Martin Landau interpreta a Robert Coolidge en la serie.
Robert Ellenstein interpreta a Philip Goddard en la serie.
Les Tremayne interpreta a Bates en la serie.
Nehemiah Persoff interpreta a Henry Selkirk en la serie.
Beau Bridges interpreta a Jay Bartlett en la serie.
James Flavin interpreta a Fire Chief Hawkins en la serie.
Claude Akins interpreta a Lou Myerson en la serie.
James Franciscus interpreta a John Novak en la serie.
Dean Jagger interpreta a Principal Albert Vane en la serie.
Bill Zuckert interpreta a Mr. Arthur Bradwell en la serie.
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