Episode Detail: Vigilante - Threshold
Ramsey is in a seedy motel room with a stripper who is murdered when a man bursts in and severs nerves in her brain stem with a surgical instrument, but the killer doesn't harm Ramsey. The investigation reveals that the victim was an alien infectee and that four other people have been murdered in a similar way. Molly concludes that an alien serial killer is at work.
Episodes: Threshold - 14 total Episodes