Diabolically Yours
Diaboliquement vôtre (original)
A wealthy amnesiac begins to suspect that his devoted wife is not really his wife and that he is not the man people keep telling him he is.
Starring Alain Delon, Senta Berger, Sergio Fantoni, Claude Piéplu, Peter Mosbacher, Albert Augier, Renate Birgo, Georges Montant, Albert Domergue, Marcel Gassouk
It's a crime and drama movie, and has a rating of 6 out of 10 from Imdb which is fairly okay for this kind of movie.
Watch it here
Not found streaming from Ireland.