Lt. Dundee - he changed some

In the movie, The Maltese Falcon, Lt. Dundee (played by Barton MacLane) is a no-nonsense, tough cop who obviously has no use at all for Sam Spade. By the time the character made the radio show, however, his persona had softened considerably, to the point that he and Spade had a fairly amicable working relationship. Of course, in the radio show, Spade himself had softened from the completely self-serving individual in the movie to a genial, likable sort who could exchange witty repartee with his secretary, Effie.