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Season 4

48 :04x01 - Extradition: British Columbia

Aug/07/2009
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: Andrew McIlroy as Stockwell | Nicholas Carella as Hotel Clerk | Darren Williams as Gallery Owner | Jonathan Holmes as Maitre'd | Jordana Largy as Female RCMP Constable | Donovan Cerminara as Male RCMP Constable | Salvatore Sortino as Driver | Mark Donnelly as Male Singer | Paul Andrich as Balloon Man | Joshua Dixon as RCMP Office Assistant | Max Fomitchev as Mime
Songs: Pink -- Trouble

49 :04x02 - He Dead

Aug/14/2009
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: Ryan Kennedy (1) as Garvin Clayton | Holly Dignard as Nyna Phillips | Carmen Moore as Rosa | Kevin McNulty as Chad Wiswall | Sage Brocklebank as Buzz McNab | Ted Whittall as Dick Cheney | Billy Mitchell as Warren Clayton | Ross Douglas as Officiant | Fred Henderson as Flying Instructor | Tariq Leslie as Driver

50 :04x03 - High Noon-ish

Aug/21/2009
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: John Tench as Deputy Tripsy | Lynda Boyd as Miss Annie | Marc Gaudet as Tourist Husband | Juliet Flint as Tourist Wife | Russ Ball as Bartender
Director: Mel Damski

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

Aug/28/2009
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

Sep/11/2009
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

Sep/18/2009
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

Sep/25/2009
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

Oct/09/2009
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: Rob Carpenter as Neck | Carlos McCullers, II as Young Gus | Drummond Macdougall as Well Dressed Man | Kristina Barr as Germophobe Woman | Dustin Schwartz as Young Man | Elisa King (1) as Young Woman | Derek Lowe as Manager | Kyra Leroux as Pippi Lockstocking | Jakobe Jenkins as Pouty Lipped Boy | John Stewart (2) as Red

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

Oct/16/2009
While working on a seemingly simple case involving an ice cream truck, Shawn stumbles into something larger and more dangerous
Guest Stars: Michael Rooker as MacQuarrie | Liam James as Young Shawn | John Hawkes as Rollins |
Co-Guest Stars: Sarah Edmondson as Gina | Sage Brocklebank as Buzz McNab | Devon Weigel as Girl #1 | Howard Siegel as Senior Mechanic | Barbara Ellison as Mrs. Nusbaum
Director: Mel Damski

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

Jan/27/2010
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: Liam James as Young Shawn | John Cena as Ewan O'Hara | Rachael Leigh Cook as Abigail Lytar | Robert Patrick as Maj. General Felts |
Co-Guest Stars: Daniel Bacon as Corporal Lejsek | Sean Rogerson as Lt. Wallach | T-Roy Kozuki as Private Tuke | Michael Kopsa as Government Official | Jordan Becker as Private Holbrook | Michael Karl Richards as Entrance Guard | Jenn Griffin as Desk Sergeant | Dexter Bell as Patroling Officer | Jonathan Kralt as Private Starks (as John Kralt) | Hector Johnson as Prison Officer
Director: Mel Damski

58 :04x11 - Thrill Seekers & Hell Raisers

Feb/03/2010
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

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

59 :04x12 - A Very Juliet Episode

Feb/10/2010
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: Sage Brocklebank as Buzz McNab | Ricki Prosper as Computer Operator

60 :04x13 - Death Is in the Air

Feb/17/2010
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: Sage Brocklebank as Buzz McNab | Dmitry Chepovetsky as James | Chasty Ballesteros as Melissa | Suzanne Ristic as Cleaning Lady | Dru Williams as Bartender | Stephanie Nudd as Jennifer Cotsitas / Ginger | Rhys Finnick as Clerk
Director: Stephen Surjik

61 :04x14 - Think Tank

Feb/24/2010
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: Liam James as Young Shawn | Bruce Davison as Snowden | Miguel Ferrer as Fred Boyd | Sandra Hess as Svetlana Progoyovic | Chris Sarandon as Ashton Bonaventure |
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

Mar/03/2010
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.

Source: USA
Guest Stars: Jeri Ryan as Dr. Kimberly Phoenix | Michael Hogan (1) as William Tanner | Liam James as Young Shawn | Kurt Fuller as Woody the Coroner |
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

Mar/10/2010
A killer targets Shawn using scenarios from classic Hitchcock films.

Source: USA
Special Guest Stars: Rachael Leigh Cook as Abigail Lytar |
Guest Stars: Liam James as Young Shawn | Jimmi Simpson as Mary Lightly | Ally Sheedy as Mr. Yang |
Co-Guest Stars: Sage Brocklebank as Buzz McNab | Chris Turner (1) as Yin (as Christopher Turner) | Melanie Yeats as Female Guard | Jane Stanton as Female Patron | Chantal Forde as Nestling Woman | Sharon Bell as Mary's Mother | Scott Anderson (2) as Kid with Plane | Beverley Turner as Waitress | 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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