- Robert Stephens - Paddy Riordan
- Susan Kohner - Rena Covic
- Jonathan Bolt - Bert
- John Cassavetes - Lloyd Sullivan
- Katherine Crawford - Marty Maddow
- Robert Ellenstein - Maddow
- Noreen Corcoran - Donna
- Leslie Nielsen - Prof. Paul Stafford
- Yale Summers - Fraternity President
- Peter Fonda - Everett Partridge
- Michael Parks - Benny Dickson
- Sondra Blake - Bernice
- Aron Kincaid - George
- Hedley Mattingly - Holman
- Philip Ober - Partridge
- Michael Constantine - Nick
- Robert Foulk - Otto
- Barbara Harris - Sophie Kannakos
- Berkeley Harris - Ron Atkins
- William Shatner - Tom Ericson
- Gene Raymond - Matt Bellamy
- Denver Pyle - Sam Riddle
- Maggie Pierce - Jean Curtis
- Pitt Herbert - Whittaker
- Eve McVeagh - Bellamy's Assistant
- Vincent Cobb - Hank
- Suzanne Pleshette - Lori Moore
- Jeanne Cooper - Margaret Dellafield
- Nancy Olson - Jessica Landon
- Forrest Tucker - Major Don Landon
- Jim McMullan - Peter Walker
- Norma Crane - Harriet Cody
- George Segal - Andre
- Greg Morris - Dr. Bledsoe
- Wendell Corey - Professor Jonathan Kobitz
- Don Gordon - Mario Saccone
- Jacqueline Scott - Irene Kobitz
- Joseph Walsh - Pvt. Lennie Schwartz
- Rip Torn - Donald Burrows
- Leslie Parrish - Joyce Ruskin
- Lisabeth Hush - Stephanie Burrows
- Kip King - Bunky
- Ed Nelson - Deke Allison
- Tim Conway - The Young Man
- Chris Robinson - Jim Wilson
- Herb Vigran - Manny
- Russ Tamblyn - Hal Langley
- Mariette Hartley - Evelyn Crown
- David Wayne - Dr. James Crown
- Stuart Margolin - Bob Brodie
- George Voskovec - Prof. Thielman
- Joyce Bulifant - Ellen Dalton
- Jack Laird
Philip Ober hace el papel de Partridge.
Robert Ellenstein interpreta a Maddow en la serie.
William Shatner hace el papel de Tom Ericson.
Robert Foulk hace el papel de Otto.
Michael Parks hace el papel de Benny Dickson.
Eve McVeagh hace el papel de Bellamy's Assistant.
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