‘Monk’ and ‘Psych’ Celebrate Friday the 13th

Great guest stars come to USA’s Monk and Psych tonight to help the shows celebrate the best time of year when it happens — Friday the 13th, of course.

Tony Shalhoub, Steve Valentine/Monk 7.15

Up first at 9pm EST on Monk‘s “Mr. Monk and The Magician” is former Crossing Jordan star Steve Valentine. He plays a magician with the stage name The Great Torini who plays head games with Monk when the legendary detective suspects him of murder.

Justine Bateman/Psych 3.15

Next at 10pm is Psych with “Tuesday The 17th” and former Family Ties star Justine Bateman, who plays Victoria. Shawn and Gus get into all kinds of spooky weirdness when a childhood friend hires them to find a missing camp counselor who disappeared near their old sleep away camp grounds, which are now abandoned and seemingly haunted.

Follow the jump for promos for both perfectly timed episodes. And FYI: Although each show has been renewed for an additional season of 16 episodes, their current seasons end next Friday.

Monk – Mr. Monk and The Magician Promo

Psych – Tuesday The 17th Promo

Photos: Tony Shalhoub and Steve Valentine, Monk (Peter “Hopper” Stone/USA Network, top); Justine Bateman, Psych (Alan Zenuk/USA Network, bottom)