On Friday's new episode of The Ghost Whisperer, Jim suspects a colleague of foul play.

Was this co-worker involved in the disappearance of a medical student? Check out the official CBS promo for "Devil's Bargain" below:

[video url="http://www.tvfanatic.com/videos/devils-bargain-promo/" title="Devil's Bargain Promo "] [/video]

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.