J. McLaren Ross

Jeff Keenan, insurance investigator, checks out the car-crash death of film star Clark Denver in the south of France. He learns that Denver, and two other victims of recent suspicious deaths, all knew the lovely Verna Berteaux...and all had been patients at a private psychiatric clinic, being treated by electronically induced dream therapy. (imdb)

In this French suspenser, a tourist gets entangled in an easy money scheme. The trouble begins when the tourist offers a hitchhiker a lift. He is quickly knocked-out and left by the road. When he regains consciousness, he finds that he is in a strange house and cannot remember who he is or how he got there. The woman who owns the house sees the amnesiac tourist's presence as a way for her to get the money her late husband was supposed to receive. (allrovi.com)

The bored wife of a business man has an affair with one of his employees.