02/28/2012 03:03 pm ET Updated Apr 29, 2012

'Psych' Midseason Premiere Sneak Peek: 'Indiana Shawn' On The Hunt For 'Kinda Crappy, Rusty Old Dagger' (EXCLUSIVE)

Get ready "Psych-Os!" The super-sized midseason premiere of USA's longest-running original series "Psych" pays homage to the "Indiana Jones" franchise, as Shawn (James Roday) and Gus (Dule Hill) team up with Despereaux (Cary Elwes) to locate a mythical dagger rumored to be the key to unlocking a dead billionaire's treasure.

And yes, the episode, titled "Indiana Shawn and the Temple of the Kinda Crappy, Rusty Old Dagger," also marks the much-anticipated return of Elwes as Despereaux.

During the Wednesday night premiere, fans can chat with star James Roday and "Psych" creator Steve Franks during the Psych Character Chatter. Fans can also follow along on Twitter using #PsychLeapDay.

"Psych" returns Wednesday, February 29 at 10 p.m. EST on USA Network.