Shawn tells Gus it's not a big deal they got fooled because "It happens to us like once every seven days" referencing that there is a new episode every 7 days.
The masks the robbery gang wear resemble the mask worn by Michael Myers in Halloween (2018), which was itself based on William Shatner's face. A cast of Shatner's face, made for the B-grade horror film The Devil's Rain (1975), was later used as a model for a commercially-sold "Captain Kirk" mask; the mask Michael Myers wears in Halloween (2018) was one of those same "Captain Kirk" masks, painted white.
Spot the Pineapple: the USA network says there is no pineapple in this episode, but many fans believe a bush outside the police station is shaped to look like a pineapple.
The first police stake-out van is disguised "O'Brien's Event Rentals". This is a reference to Psych property master Pat O'Brien.
Easter Egg: Frank mentions Dale Fern as the owner of the house he took Shawn and Gus to, and a few minutes later the zip code on the car website (48220) points to Ferndale, MI.