Steve's "arch-nemesis" Simon the Cat makes an appearance in this episode.
When Roger gets "stoned" to find Haley and Jeff, the song that is playing during his hallucination is Electric Feeling by MGMT.
When the Steve clone Stan has named "Stevearino" has left, the real Steve, now living on the living room couch for weeks, hands Stan a note his clone has left in which he states that he has dropped the "arino" part of the name he was given by Stan because he didn't want to be known as a character from "Welcome Back, Kotter." The real origin of that nickname is from the Steve Allen Show (c.1957), which featured many great supporting characters, one of whom was Tom Poston, who would start his skits by saying to the host "Hi, ho, Stevearino!"