Tracy is a scientist, Hepburn, a woman with an empty basement for his laboratory. Since the neighbors would be scandalized by the idea of unmarried people living together, however platonically, they decide to get married, although each has sworn off romance. Snappy dialogue, expertly rendered by the Tracy/Hepburn team. Terrific supporting cast keeps this minimally plotted outing afloat. Adapted from the play of the same name by Philip Barry.