Time Trax - Season 1 Episode 11

Darien learns that a doctor was killed in a manner that leads him to believe that he was killed by a fugitive from the future. Darien learns that the doctor is a plastic surgeon, so he assumes that the fugitive had his face altered. So following the man's m.o. Darien deduces that he wants to get an Incan treasure that's going to be discovered by some travelers on an adventure trek. Darien thinks that the fugitive is one of the men but after taking a medication needed for the trip, Selma can't find the man with a heartbeat of a man from the future. So Darien just goes on the trek but the man continues killing anyone who gets in his way.