This episode marked the final appearance of Jerry Paris as Agent Martin Flaherty. Paris departed the show in mid-season and was replaced by Anthony George as Cam Allison who is seen for the first time in this episode.
This episode contains one ot the most shocking scenes of the series: the murder of Rita Rocco.
Location: St. Louis
Allison: It took a long time to pay that debt back.
Ness: Yeah, it sometimes does.
Conway: (about Harrington and Courtney) Punks! Gutter rats! Both of 'em! Next thing they'll be rolling drunks in alleys. Holding up candy stores. Why don't they wear those striped turtle neck sweaters so everyone will know they're punks?
Courtney: You're putting on weight, Harrington.
Harrington: And you got a big mouth.
Courtney: I like cold cash.
Conway: That's old-fashioned thinking, Joe.
Courtney: I like old-fashioned cold cash.
Harrington: How do you like that? My own men telling me what to do. I'm an old dog, Dink. I don't llke learning new tricks.
Whitey: So you're a millionaire now, huh, Joe?
The characters of Big Tim Harrington, Eddie Runkel, and Rita Rocco are billed as Tim Hogan, Eddie Runge, and Rita Russo in the ending credits.