Regarding Norvok's powers, Cisco says "Eye snakes. Why did it have to be eye snakes?", referring to Raiders of the Lost Ark (1981) where Indy says "Snakes. Why did it have to be snakes?" when he arrives at the Well of Souls and finds that the Ark is surrounded by countless snakes.
Amunet jokingly refers to Barry as David Caruso, who portrayed Lieutenant Horatio Caine in the TV series CSI: Crime Scene Investigation (2000) and CSI: Miami (2002), and Detective John Kelly in the TV series NYPD Blue (1993).
Sonny Wells's mannerism is modeled after Andrew Dice Clay's and Lothario Wells's mannerism is similar to actor Matthew McConaughey.
Episode title "Harry and the Harrisons" is a play on the movie title Harry and the Hendersons (1987).
Other Earth's Wells calls Earth-2 Wells "Stanard". Stanard is Italian, it is for a stupid person. Other Earth's Wells reacted when Earth-2 Wells calls that a council of rejects.