I’m a big Columbo fan and Stockwell was obviously well liked by Peter Falk as he starred in at least 2 Columbos. One as a piano player on a Cruise ship (he’s suspected of murder) and another as the son of a sports magnate. He gets a block of ice to the head in that one by Robert Culp.
I have the one of him as the son of a sports magnate in my DVD collection (season 2 “The Most Crucial Game”). That is the same season as one of my favourites, “Dagger of the Mind”.