An American playwright living in Rome consults a quack psychiatrist to combat his fears of balding and save his failing marriage.
| Actor | Role |
|---|---|
 Ian McShaneFred C. Dobbs | Fred C. Dobbs |
 Anna Calder-MarshallMillie Dobbs | Millie Dobbs |
 John GavinCharlie Harrison (Grant Granite) | Charlie Harrison (Grant Granite) |
 Severn DardenDr. Fahrquardt | Dr. Fahrquardt |
 Joyce Van PattenAnna | Anna |
 Beba LončarOrnella | Ornella |
 Leopoldo TriesteDesk Clerk | Desk Clerk |
 Katia ChristineAngelica | Angelica |
 Gaby AndréFlavia | Flavia |
 Marino MaséFranco | Franco |
 Veronica CarlsonLiz | Liz |
| DDaniël SolaFernando | Fernando |
 Ian TriggerDr. Ponti | Dr. Ponti |
| SSolvi StübingGirl with Door | Girl with Door |
 Richard HarrisonHero | Hero |
| DDari LallouHesther | Hesther |
| LLinda MorandMoira | Moira |
| MMaurizio LucidiDirector | Director |
| JJanos ProhaskaGorilla | Gorilla |
 John FrederickHeavy | Heavy |
 Paul MüllerAmo Amas Amat (uncredited) | Amo Amas Amat (uncredited) |
 Karin SchubertTattooed Girl Dressed as Nurse (uncredited) | Tattooed Girl Dressed as Nurse (uncredited) |
 Madeline SmithGwendolyn (uncredited) | Gwendolyn (uncredited) |
 Josiane TanzilliGirl (uncredited) | Girl (uncredited) |
 Janet Ågren(uncredited) | (uncredited) |