Psych - Season 4
1 - Extradition: British Columbia
Air Date: August 7, 2009
Shawn and Gus spot an art thief whom Lassiter has been trying to arrest for years. So, although they are on a skiing vacation in Canada, they appeal to the local constabulary with mixed results: someone gets axed, another finds himself interrogated and Pierre Despereaux may get away scot-free, once again.
2 - He Dead
Air Date: August 14, 2009
A billionaire hedge fund manager asks Shawn and Gus to find his murderer – a last request Shawn can't resist. So he and Gus step into a world of privilege that's rivaled only by the depths of betrayal it contains.
3 - High Noon-ish
Air Date: August 21, 2009
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.
4 - The Devil's in the Details... and in the Upstairs Bedroom
Air Date: August 28, 2009
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.
5 - Shawn Gets the Yips
Air Date: September 11, 2009
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.
6 - Bollywood Homicide
Air Date: September 18, 2009
Raj, a young East Indian man whose serious girlfriends have all met with suspicious accidents, is convinced that he is the victim of a curse, but Shawn and Gus aren't buying the supernatural explanation. They are convinced that a mysterious assailant is actually responsible and they're out to catch the culprit.
7 - High Top Fade Out
Air Date: September 25, 2009
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.
8 - Let's Get Hairy
Air Date: October 9, 2009
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.
9 - Shawn Takes a Shot in the Dark
Air Date: October 16, 2009
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.
10 - You Can't Handle This Episode
Air Date: January 27, 2010
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.
11 - Thrill Seekers and Hell Raisers
Air Date: February 3, 2010
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.
12 - A Very Juliet Episode
Air Date: February 10, 2010
In 2003, Juliet made a pact with her boyfriend Scott Seaver to meet up in seven years. After he fails to show up, Shawn finds him, and by extension endangers his life since he was a key witness against mobster JT Waring, who was convicted for the murder of a US Marshall. When Waring denies killing the Marshall, Shawn must prove him right in order to protect Scott.
13 - Death Is in the Air
Air Date: February 17, 2010
Shawn and Gus must recover a deadly pathogen before a thief releases it into the city.
14 - Think Tank
Air Date: February 24, 2010
Shawn and Gus are recruited into a think tank to help prevent the murder of a business tycoon, but once the group has disbanded, they realize that one of the members plans to use the assassination ideas to kill the client instead of save him.
15 - The Head, the Tail, the Whole Damn Episode
Air Date: March 3, 2010
After Lassiter takes a page out of Shawn's book and claims a shark attack victim was actually murdered, the guys must then scramble to find the fish and prove him right.
16 - Mr. Yin Presents...
Air Date: March 10, 2010
A serial killer targets Shawn using scenarios from classic Hitchcock films.