When what begins as a little competitive sabotage in a regional spelling bee quickly escalates to murder.

Shawn and Gus must investigate the mysterious death of the "Spellmaster" at the regional Spelling Bee.

Henry's old captain believes he's solved a murder, but his Alzheimer's has caused him to forget the most important details: the crime, and who committed it.

Henry calls in Shawn and Gus who find themselves investigating a murder that happened decades ago and only the faulty memory of the retired officer gives them any hope of closing the case.

The FBI employs their own psychic in a search for a counterfeiter, causing the department to work together in an effort to prove that Shawn is the better psychic.

Henry bails on his weekend outing with Shawn, stating that he's too ill to leave the house. Shawn is nowhere near upset until he and Gus catch Henry driving by, clearly not sick at all. Naturally, they follow him and discover he used to be a member of the Monarch Lodge, a clandestine society. They barge inside looking for an explanation and are surprised to find one of the Lodge members lying dead before them. Shawn suspects murder, and in order to conduct an inside investigation, he becomes a member of the society.

It's Gus' birthday, so Shawn takes him to the launch party for Ciao clothing's new fall line. While Gus tries to make a move on his favorite model, one of the owners of Ciao is suddenly electrocuted via the stage's microphone. Shawn is certain that his death was no accident, so Shawn and Gus move in to the loft where the Ciao models live.

Eugene Franks, arrested by Henry in 1978 for plotting to bomb the SBPD, is released after his conviction is quashed by the D.A. When Shawn is instructed to solve the case, his father insists on helping him; however, the case is not as clear cut as he once thought.

Shawn and Gus go undercover at a professional football training camp when the foot of the team's missing kicker is discovered.

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

Lassiter reluctantly asks Shawn and Gus for help when his surrogate father, sheriff of Sonora, thinks a ghost is wreaking havoc in his town. And even though this Wild West re-creation town is bigger on show than facts, it turns out a real crime is being planned and the murder of the Sheriff's business rival is only the beginning.

While investigating a possible crime, Shawn stumbles upon one of a pair of criminals, gets shot, and is dumped in the trunk of a car.

Abigail is disappointed when Shawn accepts a case at the Army base instead of going on a date with her, but he and Gus are intrigued by a death they believe shouldn't have been ruled a suicide and the thought of working with Juliet's brother.

When Shawn and Gus join Gus’ new girlfriend on a rafting trip, a member of the group goes overboard, but Shawn quickly realizes it was no accident.

When a woman is found dead with a bottle of pills that are lab trial samples, Lassiter and Gus, who are taking the same tap class, team up to dance their way to catching a murderer

When a member of a gang of car thieves turns up dead, Shawn and Gus must infiltrate a drag racing ring to find the killer. Shawn soon finds himself enjoying the fast lane too much, which not only endangers the investigation but also their lives.

When a spy is framed for a crime she didn't commit, she decides to use Shawn and Gus to prove her innocence.

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.

Shawn and Gus investigate the whereabouts of a mysterious, masked vigilante named The Mantis, who is trying to take down a local drug syndicate called The Caminos. The SBPD is also trying to take down The Camino syndicate, however The Mantis always seems to be one step ahead of everyone's game. Joey McIntyre and Miles Fisher guest star.

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.

Juliet's con-man father travels to Santa Barbara to reunite with his daughter, but finds himself slipping back into his criminal past when confronted with a dream con.

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.

Shawn attempts to bond with Juliet's stepfather Lloyd, a seemingly harmless accountant.

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.

A man enters the morgue and tells Woody that he was framed for the murder of the person lying dead on the slab. When Woody won’t let him take the body, the man pulls a gun on him and holds Woody hostage in order to get what he wants. Shawn, Gus, Lassiter and Juliet try to resolve the situation calmly and carefully, but Interim Chief Trout has a plan of his own.