After Henry takes a bullet to the chest and is rushed to the hospital, a spiteful Shawn seeks revenge on the shooter and everyone else involved in the scandal.
On the 100th episode of Psych... Shawn and Gus attend a party hosted by an aging rockstar named Billy Lipps, a man the SBPD arrested years ago for a murder he doesn't remember committing.
After Gus is tasked with taking care of his girlfriend's son Maximus for the day, he jeopardizes their relationship when an innocent trip to the circus turns deadly.
The gang spends the weekend at a casino resort for a wedding and crosses paths with a local crime boss whose presence jeopardizes the impending nuptials.
After a woman dies from what appears to be a plastic surgery mishap, Shawn and Gus believe the killer is her doctor, a woman who happens to be an old flame of Henry's.
An eccentric police consultant is brought into the SBPD to interview Shawn, Gus, Lassiter and Juliet about their seemingly poor police work on a tough case.
This musical extravaganza follows Shawn and Gus' search for an escaped playwright who was declared criminally insane following a suspicious fire. Complicating matters, a person who may have important evidence is an enemy from Shawn's past.