This is one of the few episodes where James Arness and the other actors wear proper belt holsters for their pistols, instead of the usual anachronistic "buscadero" rigs.
One of at least three times that DeForest Kelley played a character interacting with another one named Cartwright in a drama, here against Eduard Franz's character of Amos Cartwright, later interacting with the Cartwrights for a few episodes of Bonanza (1959), and much later encountering Brock Peters's Admiral Cartwright in Star Trek IV: The Voyage Home (1986) and Star Trek VI: The Undiscovered Country (1991).