Shawn and Gus are hired by a childhood friend to find a missing camp counselor who disappeared near their old sleep-away campgrounds. Upon their arrival, spooky activity abounds and they must uncover if the dark past of the abandoned camp has come back to life.

After eluding capture and disappearing eight years ago, the famed Yin Yang serial killer is back, and he's set his sights on Shawn.

Shawn and Gus investigate the death of Leonald Callahan, aka Diddle, a computer cryptologist who was the baritone in Gus’s old college a capella group.

Shawn and Gus attempt to protect Stewart Grumbley from himself because the poor man believes he may be a sheep-killing werewolf who may soon enough begin killing humans.

A serial killer targets Shawn using scenarios from classic Hitchcock films.

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.

Due to an unlawful entry into a criminals property, Shawn gets suspended from his consultant postition and gets Henry fired from his position at the SBPD at the same time. Shawn has a series of Scrooge type dreams where Tony Cox is his 'spirit guide'.

The Yin/Yang trilogy comes to a thrilling close as Shawn and Gus race to save a woman kidnapped by Yin. Only this time, they are forced to use Yang's knowledge of Yin to solve the case by allowing her to accompany them on the investigation.

A body is discovered, and appears to have been killed by a vampire. Meanwhile, Lassiter becomes romantically involved with a woman whom Shawn suspects is the murderer.

The race is on to clear Woody's name and reputation when a mere mortician finds a mistake in the coroner's autopsy.

Shawn and Gus join a pair of college students in the woods who are filming a documentary on Bigfoot.

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.

Lassiter is determined to be appointed Chief of Police, so he sets out to prove himself worthy of the job by solving the murder of the Mayor’s beloved uncle, Archie Baxter, who was killed back in the 60s but the case was never solved. Meanwhile, Juliet receives some news that tests her relationship with Shawn.

Gus' nightmares start to feel like reality when he and Shawn work to solve an unlikely case for the SBPD.