A former San Francisco police detective suffering from an extreme case of obsessive-compulsive disorder is called in to investigate an apparent assassination attempt of a mayoral candidate in which one of his bodyguards is killed.
Shawn and Gus go undercover as talent show contestants to investigate a number of failed attempts to kill one of the judges.
Alex Horne risks raising Greg Davies' hackles with a task in celebration of himself. Steve Pemberton has an expletive-laden row with a bin. Plus: a novel use for a cow's ear.
The remaining five castaways must overcome multiple obstacles to guarantee they cannot be voted out of the game in the penultimate immunity challenge. With the final immunity of the season comes the power to choose who has to earn their way to the final three. Then, one castaway is crowned Sole Survivor.
Sgt. Grey helps the team prepare for their biggest mission yet. Meanwhile, Aaron, Lopez, Celina, Tim and Smitty discover a surprising connection in their case.
Juliet asks Shawn and Gus for assistance on her undercover assignment. They're only too glad to help, since it involves sorority sisters. Unfortunately, what's supposed to be an easy case turns out to have ties to their past and may endanger Juliet. Meanwhile, Lassiter locks horns with the oldest rookie the departments has ever trained.
Lonely and bored, Shawn convinces Juliet to give him a shot with a case involving a missing tennis star, but first he has to spring an unwilling Gus from a corporate retreat.
Colter investigates the disappearance of two amateur storm chasers, one of whom is the daughter of an old family friend, that the local police have written off as an accidental drowning. Colter's expert tracking skills lead him to uncover the seedy underbelly of a small town resort.
Henry's friend refuses to report his son, Brandon, missing after the son steals 30,000 dollars. Shawn agrees to help locate the son, and finds out that Brandon has been involved in some underground poker. Meanwhile, O'hara tries to surprise Lassiter on his birthday.
A local weatherman is found dead the morning after a tryst and his lover is charged with his murder despite her claims of innocence. Shawn is intrigued and becomes a defense consultant in order to gain access to the case.