This is the first episode where the "Gus nicknames" start the first nickname is "Gus Silly Pants Jackson."
Pineapple reference: a pineapple awaits behind the "Dial-A-Psychic" door. It's then given to the "Stress-Line" people as a gift.
Carlos Jacott (who plays Terrance) is in 3 other Psych episodes besides this one, The Tao of Gus (2011), Remake A.K.A. Cloudy... With a Chance of Improvement (2014), and A Nightmare on State Street (2014), as well as Psych: The Movie (2017).
The exterior location used in the opening scene is the same exterior location used for the final scene in the series finale.