USA Network announced today an all-star lineup of guest stars, including WWE Superstar John Cena, for the hit series Psych, premiering its fourth season this Friday, August 7th at 10/9c. The announcement was made by Jeff Wachtel, president, original programming, USA Network and co-head, original content, Universal Cable Productions.

The roster of guest stars also includes such notables as James Brolin as Hank, a sheriff in an old Western town with a history of vandalism where recent sightings of the Ghost Rider have occurred; Cary Elwes as a notorious international art thief; Emmy Award-winner Christine Baranski; Sendhil Ramamurthy in a Bollywood-themed episode; and the return of Rachael Leigh Cook as Shawn's girlfriend, Abigail.

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Cena will play Ewan O'Hara, a special ops soldier and brother to Maggie Lawson's character, Detective Juliet O'Hara on Psych. In this episode entitled "You Can't Handle This Episode" he will help solve the murder of two soldiers and take down an officer involved in weapons trading.

In addition, Psych will air "Let's Get Hairy," a special werewolf Halloween-themed episode co-written by James Roday and guest starring David Naughton (An American Werewolf in London) along with Joshua Malina. In another special episode, "The Devil is in the Details... and in the Upstairs Bedroom," Ray Wise is cast as Father Westley at a Catholic school where the devil needs to be exorcised.

Psych follows the adventures of young police consultant, Shawn Spencer (Roday), who solves crimes with powers of observation so acute that the precinct detectives think he's psychic. Spencer is joined by his best friend and sidekick Gus (Dule Hill) and his emotionally distant, but loving father (Corbin Bernsen), who ironically was the one who honed his son's "observation" skills as a child. Also featured are Timothy Omundson, Maggie Lawson and Kirsten Nelson.

Psych is executive produced by Steve Franks, Kelly Kulchak and Chris Henze, with Universal Cable Productions in association with Tagline Pictures. Mel Damski also serves as executive producer and director. Saladin K. Patterson (The Bernie Mac Show) and Bill Callahan (Scrubs) are co-executive producer/writers.