This is the third of six appearances Harold J. Stone makes in the series, each time playing a different character.
This is the eleventh of 20 appearances Frank Wilcox makes in this series, each time playing Federal DA Beecher Asbury. While still appearing in this series, he took on the recurring role of oilman John Brewster, a role he is perhaps best remembered for, in the hit TV sitcom The Beverly Hillbillies (1962).
This the first of three appearances Bill Baldwin makes in the series. Each appearance puts him in a minor role just as he is here: an announcer/commentator, a role that capitalizes on his storied career on radio as war correspondent during WWII and a radio program announcer. He even performed as fight announcer and/or commentator in three of the Rocky franchise movies: Rocky (1976), Rocky II (1979), and Rocky III (1982). His two other appearances in The Untouchables (1959) include Mr. Moon (1961) and The Nero Rankin Story (1961).