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Season 4

48 :04x01 - Extradition: British Columbia

Shawn and Gus go skiing in Vancouver where they meet an elusive art thief, but discover he's not all he seems.
Guest Stars: Cary Elwes as Pierre Despereaux | Peter Oldring as Staff Sergeant Hugh MacKintosh | Ed Lauter as Deputy Commissioner Ed Dykstra | Liam James as Young Shawn |
Co-Guest Stars: Max Fomitchev as Mime | Joshua Dixon as RCMP Office Assistant | Paul Andrich as Balloon Man | Mark Donnelly as Male Singer | Salvatore Sortino as Driver | Donovan Cerminara as Male RCMP Constable | Jordana Largy as Female RCMP Constable | Jonathan Holmes as Maitre'd | Darren Williams as Gallery Owner | Nicholas Carella as Hotel Clerk | Andrew McIlroy as Stockwell
Songs: Pink -- Trouble

49 :04x02 - He Dead

Shawn and Gus discover a fresh airplane crash site which killed a billionaire, but his dying words sound as if he was murdered.
Guest Stars: Rachael Leigh Cook as Abigail Lytar | Christine Baranski as Alice Clayton | Scott Holroyd as Charles | Liam James as Young Shawn |
Co-Guest Stars: Tariq Leslie as Driver | Fred Henderson as Flying Instructor | Ross Douglas as Officiant | Billy Mitchell as Warren Clayton | Ted Whittall as Dick Cheney | Sage Brocklebank as Buzz McNab | Kevin McNulty as Chad Wiswall | Carmen Moore as Rosa | Holly Dignard as Nyna Phillips | Ryan Kennedy (1) as Garvin Clayton

50 :04x03 - High Noon-ish

Vandalism at an Old West tourist attraction is forcing it to shut down. In the hopes of saving it, Lassiter secretly asks Shawn and Gus to investigate.
Guest Stars: James Brolin as Hank Mandell | Brent Sexton as County Sheriff Becker | Liam James as Young Shawn | Jim Beaver as Stinky Pete / Pete Dillingham |
Co-Guest Stars: Russ Ball as Bartender | Juliet Flint as Tourist Wife | Marc Gaudet as Tourist Husband | Lynda Boyd as Miss Annie | John Tench as Deputy Tripsy
Director: Mel Damski

51 :04x04 - The Devil's in the Details...And in the Upstairs Bedroom

Gus insists that they help their former teacher, a priest, deal with a girl who has been possessed by the Devil.
Guest Stars: Tim Conlon as Father Bard | Alexandra Krosney as Lucy | Liam James as Young Shawn | Ray Wise as Father Peter Westley |
Co-Guest Stars: Carlos McCullers, II as Young Gus | Aleks Holtz as Cameron | Chilton Crane as Mrs. Ryan | Melanie Bray as Agatha | Eva Allan as Mary | Thomas Potter as Cop |
Uncredited: Caroline Chan as Girl
Director: John Badham

52 :04x05 - Shawn Has the Yips

A robbery at a police bar ends in gunfire, causing Shawn to believe that someone is deliberately targeting Lassiter.
Special Guest Stars: Stephen Lang as Salamatchia |
Guest Stars: Dink O'Neal as Dr. Manny | Liam James as Young Shawn |
Co-Guest Stars: Sage Brocklebank as Buzz McNab | Craig March as Tim | Melissa Robertson as Waitress | Crystal Balint as Reporter | Igor Ingelsman as Petrovich | Charles Siegel as Dr. Erlich | Dwayne Bryshun as News Anchor

53 :04x06 - Bollywood Homicide

A man enlists Shawn and Gus' help to lift a curse which places his girlfriends in danger
Guest Stars: Rachael Leigh Cook as Abigail Lytar | Sendhil Ramamurthy as Raj | Azita Ghanizada as Mina | Madhur Jaffrey as Rani | Lisa Ray as Sita | Liam James as Young Shawn | Jay Chandrasekhar as Jay |
Co-Guest Stars: Sage Brocklebank as Buzz McNab | Bhavkhandan Singh Rakhra as Stagehand | Rosette Sharma as Raini | Hilary Jardine as Victoria | Beatrice Ilg as Gita

54 :04x07 - High Top Fade Out

Gus rejoins his college singing buddies from his old a cappella group after a member of the quartet is found murdered. Together, they are able to decipher an encrypted message which could produce the killer.
Guest Stars: Kenan Thompson as Joon | Jaleel White as Tony | Tony Todd as Det. Moses Johnson | Liam James as Young Shawn | Kurt Fuller as Woody the Coroner |
Co-Guest Stars: Sage Brocklebank as Buzz McNab | Ecstasia Sanders as Chelsea | Demord Dann as Leonard Callahan | Andrew Wheeler as Mr. Tully | Chris Shields as Minister | Charles Zuckermann as Armed Assailant #1 | Kenji Maeda as Tech Geek
Director: Stephen Surjik
Songs: Boyz II Men -- Psych Theme

55 :04x08 - Let's Get Hairy

A man who believes he may be a werewolf enlists the help of Shawn and Gus.
Guest Stars: Joshua Malina as Stewart Grimbly | Thomas F. Wilson as Butch Zielinski | Larisa Oleynik as Willow Grimbly | Jessalyn Wanlim as Polexia | Liam James as Young Shawn | David Naughton as Dr. Ken Tucker | Deanna Dunagan as Myrtle |
Co-Guest Stars: John Stewart (2) as Red | Jakobe Jenkins as Pouty Lipped Boy | Kyra Leroux as Pippi Lockstocking | Derek Lowe as Manager | Elisa King (1) as Young Woman | Dustin Schwartz as Young Man | Kristina Barr as Germophobe Woman | Drummond Macdougall as Well Dressed Man | Carlos McCullers, II as Young Gus | Rob Carpenter as Neck

56 :04x09 - Shawn Takes a Shot in the Dark

While working on a seemingly simple case involving an ice cream truck, Shawn stumbles into something larger and more dangerous
Guest Stars: John Hawkes as Rollins | Michael Rooker as MacQuarrie | Liam James as Young Shawn |
Co-Guest Stars: Barbara Ellison as Mrs. Nusbaum | Howard Siegel as Senior Mechanic | Devon Weigel as Girl #1 | Sage Brocklebank as Buzz McNab | Sarah Edmondson as Gina
Director: Mel Damski

57 :04x10 - You Can't Handle This Episode

Shawn goes up against the Army when he believes that a Private's suicide was actually murder, and begins to think that Juliet's brother is somehow involved in the death.
Guest Stars: Robert Patrick as Maj. General Felts | Rachael Leigh Cook as Abigail Lytar | John Cena as Ewan O'Hara | Liam James as Young Shawn |
Co-Guest Stars: Jonathan Kralt as Private Starks (as John Kralt) | Hector Johnson as Prison Officer | Dexter Bell as Patroling Officer | Jenn Griffin as Desk Sergeant | Michael Karl Richards as Entrance Guard | Jordan Becker as Private Holbrook | Michael Kopsa as Government Official | T-Roy Kozuki as Private Tuke | Sean Rogerson as Lt. Wallach | Daniel Bacon as Corporal Lejsek
Director: Mel Damski

58 :04x11 - Thrill Seekers & Hell Raisers

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

Source: USA
Guest Stars: Kurt Fuller as Woody the Coroner | Steve Howey as Derek | Sarah Shahi as Ruby | Stacy Keibler as Jessica Martino | Liam James as Young Shawn |
Co-Guest Stars: Bradley Stryker as Stu | Matt Johnson (1) as Brian Sampson (as Matt David Johnson) | Pablo Silveira as Charles Lucas | Carlos McCullers, II as Young Gus
Director: Mel Damski

59 :04x12 - A Very Juliet Episode

An ex-boyfriend returns in Juliet's life and Shawn is anything but happy.
Guest Stars: Josh Braaten as Scott Seaver | Craig Sheffer as Agent Wayne | Arnold Vosloo as J.T. Waring |
Co-Guest Stars: Ricki Prosper as Computer Operator | Sage Brocklebank as Buzz McNab

60 :04x13 - Death Is in the Air

Shawn and Gus must recover a deadly pathogen before a thief releases it into the city.

Source: USA
Guest Stars: Ernie Grunwald as Donny Leberman | Cullen Douglas as Dr. Tony Mallon | Liam James as Young Shawn | Judd Nelson as Dr. Steven Reidman |
Co-Guest Stars: Rhys Finnick as Clerk | Stephanie Nudd as Jennifer Cotsitas / Ginger | Dru Williams as Bartender | Suzanne Ristic as Cleaning Lady | Chasty Ballesteros as Melissa | Dmitry Chepovetsky as James | Sage Brocklebank as Buzz McNab
Director: Stephen Surjik

61 :04x14 - Think Tank

Shawn and Gus are thrilled when they're asked to join an elite security company, but the team to which they are assigned are not quite as thrilled with their unconventional techniques and the affect it has on their latest assignment: preventing the assassination of a billionaire executive.

Source: USA
Guest Stars: Chris Sarandon as Ashton Bonaventure | Sandra Hess as Svetlana Progoyovic | Miguel Ferrer as Fred Boyd | Bruce Davison as Snowden | Liam James as Young Shawn |
Co-Guest Stars: Albert Miro as Sal | Alex Zahara as Zenuk | Marcus Hondro as Vito
Director: Stephen Surjik

62 :04x15 - The Head, the Tail, the Whole Damn Episode

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.

Source: USA
Guest Stars: Kurt Fuller as Woody the Coroner | Liam James as Young Shawn | Michael Hogan as William Tanner | Jeri Ryan as Dr. Kimberly Phoenix |
Co-Guest Stars: Sage Brocklebank as Buzz McNab | Stephen Holmes as Reporter #1 | Benita Ha as Reporter #2 | Ross Tweedale as Fisherman
Director: Matt Shakman

63 :04x16 - Mr. Yin Presents

A killer targets Shawn using scenarios from classic Hitchcock films.

Source: USA
Special Guest Stars: Rachael Leigh Cook as Abigail Lytar |
Guest Stars: Jimmi Simpson as Mary Lightly | Ally Sheedy as Mr. Yang | Liam James as Young Shawn |
Co-Guest Stars: Beverley Turner as Waitress | Scott Anderson (2) as Kid with Plane | Sharon Bell as Mary's Mother | Chantal Forde as Nestling Woman | Jane Stanton as Female Patron | Melanie Yeats as Female Guard | Chris Turner (1) as Yin (as Christopher Turner) | Sage Brocklebank as Buzz McNab | David Attar as Nestling Man
Director: James Roday
Warning: Psych guide may contain spoilers
Classification: Scripted
Genre: Comedy | Drama
Status: Ended
Network: USA Network ( USA)
Airs: Wednesdays at 09:00 pm
Runtime: 60 Minutes
Premiere: July 07, 2006
Ended: March 26, 2014
Episode Order: 11
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