Plot summary
While giving a lecture to his mentor's graduate students, Lightman meets Martin ( Jason Dohring ), who mocks Lightman's work and then beats his deception techniques, twice, in front of the class. Since it seems that Martin is aroused by images of torture yet disgusted by images of sexy women, Lightman concludes that he's a psychopath and possibly a murderer, but Lightman's mentor and the university and even Foster wonder if Lightman's just upset that Martin beat his system. As Lightman grows more sure of his hunch, and learns that a girl has gone missing, he begins to stalk Martin and even puts up posters to warn the other girls on campus.
Foster fails to see the clues Lightman is sure of, and he gets a little ruffled when she doesn't support his claims. Eventually Lightman sets a trap--only to have Martin, "five steps ahead," kidnap Lightman instead. Meanwhile, Loker and Torres look into a UFO sighting by a science teacher whose job is at stake due to his claims. Loker and Torres follow the trail resulting in an encounter with Air Force Colonel Gorman ( Glenn Morshower )
Credits
Adapted from Wikipedia contributors, List of Lie to Me episodes. HTML formatting and reference markers removed.