Psych

- Season 4

(2009)

While on vacation in Vancouver, Shawn finds himself in the presence of an elusive art thief that Lassiter has worked his whole career to catch, much to his ill, and Gus's as well.

Shawn and Gus arrive at the scene of a plane crash in time to find that the pilot wants the duo to avenge his death - and the two proceed to investigate the man's pretentiously wealthy family.

When Lassie's favorite childhood hangout is going to close, he secretly hires Shawn to investigate the reason - and he and Gus uncover a dead body in the process.

Shawn and Gus investigate the suicide of a student at a Catholic University, which a priest and former teacher believes was caused the devil.

After a shootout in a bar, Shawn and Gus learn that a ruthless drug lord is targeting everyone who worked on the one case they weren't assigned to - or is he?

Shawn and Gus enter the world of Bollywood to investigate when every girlfriend of Raj, a young Indian man, meets with a mysterious accident.

A member of Gus's college singing group is murdered, and while the other surviving members are no longer on speaking terms with Gus, they hire Shawn anyway to investigate the crime, after the police classify the death as accidental.

Shawn and Gus are hired to protect a guy who thinks he's a werewolf and find there's more to his story than they thought.

While investigating a crime involving an ice cream truck, Shawn stumbles upon a different crime in progress and is taken hostage by the criminals.

Shawn and Gus go undercover at a military base when Juliet's brother is accused of murdering one of his fellow officers.

Shawn accuses Gus's new girlfriend of murder when a river-rafting trip turns up a dead body in the process.

Juliet hires Gus to track down an old boyfriend but Shawn eventually finds out that he's in the witness protection program as the key witness to a huge murder case.

A murder in a convenience store leads Shawn and Gus to believe that the victim contracted a deadly experimental virus, and not only seek to find who's behind it but believe they also hold the cure to it.

Shawn and Gus infiltrate a think tank to prevent the assassination of a corporate big wig but he doesn't believe he's the target.

When a man's body washes up on the beach, it seems to be a simple shark attack, but Shawn and Lassiter suspect foul play.

A year after the arrest of Mr. Yang, a new killer starts playing games with Shawn and his friends - her partner, Mr. Yin.