| Natalie Wood | Carol Sanders |
| Robert Culp | Bob Sanders |
| Elliott Gould | Ted Henderson |
| Dyan Cannon | Alice Henderson |
| Horst Ebersberg | Horst |
| Lee Bergere | Emilio |
| Donald F. Muhich | Psychiatrist |
| Noble Lee Holderread | Sean Sanders |
| K.T. Stevens | Phyllis |
| Celeste Yarnell | Susan |
| Carol O'Leary | Sue |
| Andre Phillipe | Oscar |
| Greg Mullavey | Group Leader |
After returning to Los Angeles from a group therapy session, documentary filmmaker Bob Sanders and his wife, Carol, find themselves becoming vigilante couples counselors, offering unsolicited advice to their best friends, Ted and Alice Henderson . Not wanting to be rude, the Hendersons play along, but some latent sexual tension among the four soon comes bubbling to the surface, and long-buried desires don't stay buried for long.
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