A young American woman traveling through Italy finds herself in a strange Mediterranean villa where nothing seems quite right.
| Actor | Role |
|---|---|
 Marcello MastroianniAlex | Alex |
 Sydne RomeNancy | Nancy |
 Hugh GriffithJoseph Noblart | Joseph Noblart |
 Guido AlbertiPriest | Priest |
 Henning SchlüterCatone | Catone |
| GGianfranco PiacentiniTony | Tony |
| CChristiane BarryDresser | Dresser |
 Pietro TordiMan-Servant | Man-Servant |
 Mogens von GadowGerman | German |
 Dieter HallervordenGerman | German |
 Romolo ValliGiovanni | Giovanni |
 Roman PolanskiMosquito | Mosquito |
 Richard McNamaraCharlie | Charlie |
 John KarlsenEdward | Edward |
 Livio GalassiNot listed | Not listed |
 Alvaro VitaliCross-Eyed Painter | Cross-Eyed Painter |
 Renate LangerNaked Girl with Hat (uncredited) | Naked Girl with Hat (uncredited) |
 Carla ManciniNot listed | Not listed |
 Nerina MontagnaniNot listed | Not listed |
 Franco PesceNot listed | Not listed |