For Heaven's Sake has a number of witty lines and an interesting premise. If you charted this movie you would see a dip into sentimentality every time Edmund Gwenn shows up. He's such a joke killer in this film. Luckily, he doesn't show up too often. Robert Cummings, never an outstanding presence, turns in a forgettable performance as the theatrical husband and the proximity of his mediocrity somehow manages to suck the life out of the wife, played by Joan Bennett who is usually better than she comes across here. Clifton Webb, sans mustache, is a hoot. In my favorite scene he plays bebop on the harp. It's worth sitting through the whole film just to see that scene.