An ad executive impersonates an archeology professor to avoid a situation with an obsessed former lover. She enlists the help of a hapless archeologist who is at the airport to pick the real archeology professor. What follows is a series of conflicting and comical situations involving the "switcheroo."
| Actor | Role |
|---|---|
 Gérard DepardieuJulien Chayssac | Julien Chayssac |
 Sigourney WeaverJessica Fitzgerald | Jessica Fitzgerald |
 Ruth WestheimerMrs. Heffner | Mrs. Heffner |
 Michel AumontPierre Carriere | Pierre Carriere |
 Zabou BreitmanConstance Michoux | Constance Michoux |
 Yann BabiléeAlex Grimaldi | Alex Grimaldi |
 Maurice BarrierLe maire | Le maire |
 Jean-Pierre BissonGino Grimaldi | Gino Grimaldi |
| RRobert BlumenfeldPatrick | Patrick |
| MMichael GoldmanPDG Maxwell | PDG Maxwell |
| AAxel BogousslavskyAntoine | Antoine |
| TTannis VallelyZoé | Zoé |
 Jean-Quentin ChâtelainHomère | Homère |
 André JulienOld Man | Old Man |
 Jean-Paul MuelPaleontologist Marc | Paleontologist Marc |
 Jean-François PerrierHotel Concierge | Hotel Concierge |
 André HaberHotel Bellhop | Hotel Bellhop |
| PPhilippe DehesdinAcademician | Academician |
 Mathé SouverbieAcademician | Academician |
| PPhilippe DesboeufAcademician | Academician |
 Dion AndersonPorter | Porter |
 Janet AldrichSecretary | Secretary |
| KKyle Scott JacksonChauffeur | Chauffeur |
| SSeth AllenAssistant | Assistant |