This is the fourth of five appearances Carl Milletaire makes in the series. Each of his first two appearances put him in a different role. This is his second of three appearances in the role of gangster Pete Konitz, one of Frank Nitti's henchmen.
Adjusted for inflation, the $50,000 Nick demands from Louis would equal approximately $1,140,000 in the year 2024.
This is the first of three appearances Lee Marvin makes in the series, playing each time a different character. To TV audiences in the early 1960s, he would be best known for his role as Detective Frank Ballinger in the crime drama M Squad (1957).