This episode makes references to the characters of Quint Asper (played by Burt Reynolds, 1962- 1965), and Chester Goode (played by Dennis Weaver, 1955- 1964).
Ben Bates, who doubles for Matt in the last scene, was James Arness's double on the show. In real life,Arness had trouble walking due to taking bullets in a knee on Anzio Beach.
Alex Sharp, who played the third Matt, had been a stuntman for 10 episodes from 1957 - 1968 on the show.
The gun suppressor wasn't invented until 1902.