Cat and Mouse
Le Chat et la souris (original)
A jaded and charming police inspector is assigned along with his cheerful partner to a case involving the mysterious death and/or suicide of a wealthy entrepreneur. The chief suspect is his enchanting wife who was aware that her husband had a mistress. It is also possible that the dead man may be the victim of a radical terrorist group.
Starring Michèle Morgan, Serge Reggiani, Philippe Léotard, Jean-Pierre Aumont, Valérie Lagrange, Michel Peyrelon, Christine Laurent, Philippe Labro, Jacques François, Arlette Emmery
It's a crime and drama movie, and has a rating of 6.5 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Ireland.