When a college girl at a Catholic university commits suicide, Gus and Shawn are brought in because one of the professors at the school believes the girl was demon-possessed.

After a cop bar is shot up in an apparent robbery during Officer McNab's birthday celebration, Shawn realizes the shooter was actually targeting Lassiter.

Shawn and Gus must recover a deadly pathogen before a thief releases it into the city.

Shawn and Gus get themselves hired onto the case when an unstable lawyer claims his assistant was abducted by aliens.

Shawn has to face serious competition when a talented criminal profiler named Declan Rand comes to Santa Barbara to help solve the murders of donors on a liver-transplant list.

The episode kicks off with Shawn and Gus receiving a mysterious e-mail inviting them to the annual Cinnamon Festival in Dual Spires, a quirky Northern California town nearly invisible on the map. When they arrive the pair quickly find themselves embroiled in the mysterious death of local high school student Paula Merral. As Shawn and Gus unravel the many secrets of the town, they meet several local residents including town doctor/lawyer/veterinarian Donna Gooden, Sheriff Andrew Jackson, proprietors of the local diner Robert and Michelle Barker, the mysterious Woman with Wood and enigmatic bookish beauty Maudette Hornsby. The pool of suspects proves to be deeper than suspected as Shawn and Gus must work to figure out who killed Paula Merral.

When they solve a case without following proper protocols, Shawn and Gus are ordered by the Chief to take a crash course at the police academy in order to learn the correct way to handle cases, but the two resort back to their old ways.

When the hitting coach of the Santa Barbara Seabirds suddenly dies, the team's manager hires Shawn and Gus to go undercover as the new coach and mascot in order to investigate.

A body relating to a 20-year-old case is finally found, and Shawn, Gus, and Henry revisit all the old suspects in order to solve the case

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.

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.

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.