Mannix stages a meeting with Irina at a coffee house called the Bad Scene, where Neil Diamond is performing "The Boat That I Row", "Raisin' Caine" and, in a later scene, "Solitary Man". "Raisin' Caine", which is interrupted by a fight and finds Neil Diamond asking Mannix if he can finish his show, has not yet appeared on any Neil Diamond record.
The creators of the show, Richard Levinson and William Link, wanted the character of Mannix never to have a first name (similar to another of their creations, Columbo (1971), who never did acquire a first name). By the time the show got into production, however, Levinson and Link had moved onto other projects, and Mannix had a first initial, "J.," in Mannix: The Name Is Mannix (1967). In this episode he actually uses his first name, "Joe," for the first time.