Filmed in Winnipeg, MB Canada
The tune John Sleator was whistling at the end of "This Isn't Real" is the Candle Cove theme, used in the first season of the show.
The song playing when Margo enters the party is "Gooey" by Glass Animals.
This episode is the beginning of the No-End House storyline.
The song that is playing in Room 1 is "The Ghost That Never Walked" by Billy Murray.