A California professor (Martin Sheen), his wife (Blythe Danner) and his daughters make room for his orphaned illegitimate French son (Sebastian Dungan).
| Actor | Role |
|---|---|
 Martin SheenRobert Beckwith | Robert Beckwith |
 Blythe DannerSheila Beckwith | Sheila Beckwith |
 Craig T. NelsonBernie Ackerman | Bernie Ackerman |
 David HemmingsGavin Wilson | Gavin Wilson |
 Nathalie NellNicole Guerin | Nicole Guerin |
| AAnne BrunerTWA Stewardess #1 | TWA Stewardess #1 |
| SSebastian DunganNot listed | Not listed |
 Billy JayneNot listed | Not listed |
| MMaureen AndermanNot listed | Not listed |
 Jacques FrançoisLouis | Louis |