While probing a series of ritualistic murders, Mulder becomes involved with a beautiful suspect who may be a vampire.
Grissom and Catherine investigate the stabbing death of an 80-year-old woman who lived in a run-down house full of cats.
In order to get intel on a matter of national security, Kensi must come face-to-face with a sociopath who has been obsessed with her since she put him in jail years ago; Eric is desperate to keep Kensi safe, but he is forced to leave NCIS.
When a naval intelligence officer is tortured and murdered, NCIS discovers that CIA operatives are being killed in the same way
While on 21st-century Earth, Sisko takes charge of a hostage situation in order to be sure history happens as it was recorded.