This episode was meant to be the vehicle for a spin off show for Lucie Arnaz but the new show was not picked up.
The cover photo used for the third season of Here's Lucy is situated (framed) on a table directly behind Kim's couch.
Lucy has given Kim a book titled "Self Defense for Women". In reality, the book was authored by Alice McGrath and Bruce Tegner. McGrath served as the episode's consultant and fight choreographer. McGrath was trained by and taught with Bruce Tegner at his school in Hollywood, CA. Together they developed a special course of self-defense for girls and women which Miss McGrath introduced in 1967. Both receive credit at the end of the episode.