Harley's (Kaley Cuoco) mother (Katey Sagal) in flashback pictures is seen with the same look that Katey Sagal had in Married... with Children (1987). Katey Sagal played Kaley Cuoco's mother on 8 Simple Rules (2002) and had a cameo as her mother on The Big Bang Theory (2007).
This episode reunites Kaley Cuoco and Charlie Adler as voice actors since their roles as Brandy & Mr. Whiskers (2004)
We meet Harley's parents and grandparents in this episode.