Rehearsal for Murder
Starring Lynn Redgrave, Robert Preston, Patrick Macnee, Jeff Goldblum, Lawrence Pressman, William Russ, William Daniels, Madolyn Smith Osborne, Wallace Rooney, John P. Finnegan
It's a drama and mystery movie, and has a rating of 6.8 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Switzerland.