Shawn has a pineapple emblem on his blue collared shirt, he's eating pineapple & movie theater popcorn jelly beans, plus, he also brings one to Chief Vick's house before he does the wrap up.
When Shawn is making Star Trek gags about the StarTek company, some of the Star Trek TOS sound effects from the Enterprise bridge can be heard in the background, most clearly in the near silence immediately after Lassie challenges the StarTek employee to explain how he would go about robbing the company's clients.
When Shawn yells out "Perry! Luke! I'll be sitting right here," it's a nod to actor Luke Perry.
The Red Balloon Agency is a reference to the song "99 Red Balloons" by Nena. The song can be heard when Shawn fake proposes to Juliet and Gus interviews some of the nannies.
One of the few times then-Interim Chief Vick mentions her husband - saying she almost ran him over in the driveway in a fit of sleep deprivation-related anger. He is never seen, and hardly ever mentioned again. Same went for their daughter, Iris, whose name is first spoken here, until Psych: The Movie (2017). There a now pre-teen Iris appears, played by Emma Tremblay.