- Claude Akins,
as Lou Myerson in "One Monday Afternoon" (1964)
- Eddie Albert,
as Charlie O'Rourke in "Visions of Sugar Plums" (1964)
- Frank Albertson,
as Jim O'Neal in "The Death of a Teacher" (1964)
- Edward Andrews,
in "The Song of Songs" (1964)
- Tige Andrews,
as Lt. Charles Green in "A Single Isolated Incident" (1963)
- Ed Asner, twice as Harmon Stern and Paul Berg
- Frankie Avalon,
as David Muller in "A Thousand Voices" (1963)
- Phyllis Avery,
three episodes as Mrs. Ruth Wilkinson
- Diane Baker,
as Mrs. Chase in "A Feeling for Friday" (1963)
- Jeanne Bal,
two episodes as assistant vice-principal Jean Pagano
- Don
"Red" Barry, as
Anthony Gallo in "First Year, First Day" (series premiere, 1963)
- Herschel Bernardi, as Mr. Otis in "I Don't Even Live Here"
(1963)
- Tony Bill,
as Chris Herrod in "An Elephant Is Like a
Tree" (1965)
- Whit Bissell,
as Karl Bellini in "May Day, May Day" (1965)
- Shirley Bonne,
as Susan Hotchkiss in "Sparrow on the Wire" (1964)
- Peter Breck, as Dr. Ted Dietrich in "A Feeling for
Friday" (1963)
- Beau Bridges,
three episodes, 1963-1965
- Geraldine
Brooks, as Claire Andreas in
"Love Among the Grown-Ups" (1964)
- Brooke Bundy,
three episodes in different roles, including as Patrice Morgan in "X
Is the Unknown Factor" (1963)
- Macdonald Carey,
as Mr. Edwards in "Pay the Two Dollars" (1963)
- Virginia Christine, as Mrs. Payne in "The Exile" (1964)
- Jeanne Cooper,
as Louise Sargent in "The Boy Without a
Country" (1963)
- Noreen Corcoran,
as Cathy Williams in "Fair The Well" (1964)
- Johnny Crawford,
two episodes, as JoJo Rizzo in "Let's Dig a
Little Grammar" (1964) and as a delegate from the former Soviet Union
in "The Tender Twigs" (1965)
- Robert
L. Crawford, Jr., brother of Johnny Crawford,
as a Cuban delegate in "The Tender Twigs" (1965)
- Pat Crowley,
as Ariel Wilder in "Love in the Wrong Decision" (1963)
- Robert Culp,
as Frank Menlo in "The Tender Twigs" (1965)
- Royal Dano, as Mr. Metcalfe in "To Break a Camel's
Back" (1963)
- Kim Darby,
two episodes, one as Judy Wheeler (1965)
- Bobby Diamond,
as Gus in "Visions of Sugar Plums" (1964)
- Micky Dolenz, as Ed in "Born of Kings and Angels" (1964)
- Tony Dow
was cast five times from 1963 to 1965, three as George.
- Howard Duff,
as Joe Stillman in "Mountains to
Climb" (1965)
- Leo Durocher,
as himself in "Boy Under Glass" (1964)
- Ross Elliott,
two episodes (1963-1964)
- Richard Eyer, as Jeff in "Day in the Year" (1964)
- Shelly Fabares, two episodes as Dani Cooper
(1964-1965)
- Norman Fell,
as Barney Sanders in "And Then I Wrote ..." (1965)
- Frank Ferguson,
as Stanley Novak in "Moonlighting" (1964)
- James Flavin, as Fire Chief Hawkins in "Beyond a Reasonable
Doubt" (1964)
- Steven Franken,
twice as Jerry Allen (1963)
- Bonnie Franklin,
as Sally in "How Does Your Garden Grow?" and in "The People
Doll: You Wind It Up, and It Makes Mistakes" (both 1964)
- Arthur Franz,
two episodes as Det. Sgt. Sol Moss (1964)
- Terri Garr,
as Lisa in "How Does Your Garden Grow?" (1964)
- Kathy Garver, in "Sparrow on the Wire" (1964)
- Lillian Gish,
as Maude Phipps in "Hello, Miss Phipps" (1963)
- Don Grady,
as Joey Carter (1964) and as Hank Nelby in
"Once a Clown" (1965 series finale)
- Pat
Harrington, Jr., as Thomas Kelly in
"There's a Penguin in My Garden" (1965)
- Joey Heatherton,
as Holly Metcalfe in "To Break a Camel's Back" (1963)
- Peter Helm
appeared three times, including the lead guest-star role in "The
Private Life of Douglas Morgan, Jr." (1964)
- Cheryl Holdridge, as Betty in "The Private Life of Douglas Morgan
Jr." (1964)
- Celeste Holm,
as Rose Herrod in "An Elephant Is Like a
Tree" (1965)
- Sherry Jackson,
as Cathy Ferguson in "The Risk" (1963)
- Arch Johnson,
two episodes, once as Coach Brewer (1964)
- Tommy Kirk,
as Tod Seaton in "Love in the Wrong
Season" (1963)
- Diane Ladd,
as Mrs. Otis in "I Don't Really Live Here" (1963)
- Martin Landau,
two episodes as Victor Rand (1963) and as Robert Coolidge in "Enter a
Strange Animal" (1965)
- Cloris Leachman, as Dorothy Hummer in the two-part episode
"Faculty Follies" (1965)
- Harvey Lembeck, as Vic Rizzo in "Let's Dig a Little
Grammar" (1964)
- Peggy Lipton,
as Selma in "And Then I Wrote ..." (1965)
- June Lockhart,
as Mrs. Nelby, mother of the Don Grady
character, in "Once a Clown" (1965)
- Robert Logan,
as Jerry Hendricks in "Johnny Ride the Pony: One, Two, Three"
(1964)
- Claudine Longet, as Sharhri Javid in "The Silent Dissauders"
(1965)
- Frank Maxwell,
two episodes (1964-1965)
- Kevin
McCarthy, as Mr. Williams in "Fair
the Well" (1964)
- Tim McIntire,
two episodes (1963-1964)
- Vera Miles,
as Sister Gervaise in "There's a Penguin in
My Garden" (1965)
- Patricia Morrow,
four episodes as different characters
- Edward Mulhare, as Rand Hardy in "He Who Can Does" (1963)
- Lois Nettleton,
as Jean Corcoran in "Where Is There to Go, Billie, But Up?"
(1965)
- Simon Oakland,
as Carl Green in "With a Hammer in His Hand, Lord, Lord!" (1964)
- Nehemiah Persoff, as Henry Selkirk in "Enter a Strange
Animal" (1965)
- Denver Pyle,
as Brill in "Johnny Ride the Pony: One, Two, Three" (1964)
- Robert Random,
three episodes (1964-1965)
- Tommy Rettig, as Frank in "The Firebrand" (1965)
- Stephen Roberts,
six episodes as Stan Peeples
- Katharine Ross,
as Mrs. Bellway in "Faculty Follies, Part
II" (1965)
- Marion Ross,
as Nurse Bromfield in "Fair the Well" (1964)
- Tommy
Sands, two episodes (1964-1965)
- Brenda Scott,
as Sue Johnson in "Fear Is a Handful of Dust"(1964)
- Alexander Scourby, two episodes (1963-1964)
- Frank Silvera, as Andy Towner in "Boy Under Glass" (1964)
- Mark Slade,
three episodes (1964-1965)
- Julie Sommars, as Ellen Cable in "The Firebrand" (1965)
- Tisha Sterling,
as Myra in "The Firebrand" (1965)
- Harold J. Stone
as Joe Garvin in "Beat the Plowshares, Edge the Sword" (1965)
- Maxine Stuart,
as Angie (1963) and Miss Gardner (1964)
- Karl Swenson,
as Mr. Haskell in "Love Among the Grown-Ups" (1964)
- Buck Taylor,
three episodes (1964-1965)
- Malachi Throne,
four episodes (1964-1965)
- Joan Tompkins,
as Mrs. Douglas Morgan, Sr., in "The Private Life of Douglas Morgan,
Jr." (1964)
- Harry Townes,
two episodes, including the role of Frank Dever
in "The Death of a Teacher" (1964)
- Lurene Tuttle,
as Mrs. Grange in "The Risk" (1963)
- Susan Tyrrell,
in her first acting role as Phyllis Freuchen in
"Beyond a Reasonable Doubt" (1964)
- Joyce Van Patten, as Avis Brown in "From the Brow of Zeus"
(1965)
- June Vincent,
as Mrs. Wilder in "Love in the Wrong Season" (1963)
- Beverly Washburn, two episodes (1964-1965)
- Michael Winkelman, three episodes (1963)