At fictional Harrad College students learn about sexuality and experiment with each other. Based on the 1966 book of the same name by Robert Rimmer, this movie deals with the concept of free love during the height of the sexual revolution which took place in the United States.
| Actor | Role |
|---|---|
 James WhitmorePhilip Tenhausen | Philip Tenhausen |
 Tippi HedrenMargaret Tenhausen | Margaret Tenhausen |
 Don JohnsonStanley Cole | Stanley Cole |
 Bruno KirbyHarry Schacht | Harry Schacht |
 Laurie WaltersSheila Grove | Sheila Grove |
 Victoria ThompsonBeth Hillyer | Beth Hillyer |
 Elliott StreetWilson | Wilson |
 Billy SandsJack | Jack |
 Sharon UllrickBarbara | Barbara |
 Maggie WellmanCynthia | Cynthia |
 Michael GreeneYoga Instructor | Yoga Instructor |
| RRon KolmanEvan | Evan |
 Eric ServerWorkman | Workman |
| RRobert C. RossWorkman | Workman |
 Robert MiddletonSidney Bower | Sidney Bower |
 Fred WillardThe Ace Trucking Company | The Ace Trucking Company |
 Michael MisloveThe Ace Trucking Company | The Ace Trucking Company |
 George MemmoliThe Ace Trucking Company | The Ace Trucking Company |
 Bill SalugaThe Ace Trucking Company | The Ace Trucking Company |
| MMary Elaine MontiThe Ace Trucking Company | The Ace Trucking Company |
 Melanie GriffithStudent (uncredited) | Student (uncredited) |
 Gregory HarrisonStudent (uncredited) | Student (uncredited) |