第 4 季 共 16 集
播出时间：2009年8月8日
第 1 集 Extradition: British Columbia
播出时间：2009年8月8日
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.
第 2 集 He Dead
播出时间：2009年8月15日
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.
第 3 集 High Noon-ish
播出时间：2009年8月22日
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.
第 4 集 The Devil's in the Details... and in the Upstairs Bedroom
播出时间：2009年8月29日
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.
第 5 集 Shawn Gets the Yips
播出时间：2009年9月12日
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.
第 6 集 Bollywood Homicide
播出时间：2009年9月19日
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.
第 7 集 High Top Fade Out
播出时间：2009年9月26日
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.
第 8 集 Let's Get Hairy
播出时间：2009年10月10日
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.
第 9 集 Shawn Takes a Shot in the Dark
播出时间：2009年10月17日
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.
第 10 集 You Can't Handle This Episode
播出时间：2010年1月28日
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.
第 11 集 Thrill Seekers and Hell Raisers
播出时间：2010年2月4日
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.
第 12 集 A Very Juliet Episode
播出时间：2010年2月11日
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.
第 13 集 Death Is In The Air
播出时间：2010年2月18日
Shawn and Gus must recover a deadly pathogen before a thief releases it into the city.
第 14 集 Think Tank
播出时间：2010年2月25日
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.
第 15 集 The Head, The Tail, The Whole D* Episode
播出时间：2010年3月4日
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.
第 16 集 Mr. Yin Presents...
播出时间：2010年3月11日
A serial killer targets Shawn using scenarios from classic Hitchcock films.
