- "Someone's got to take the blame, Little Sister, and it's not going to be me."
When a female police officer, BJ Morrow, starts displaying preternatural knowledge of a set of 50-year-old serial killings, Mulder theorizes some kind of clairvoyance. But when new victims start turning up, it seems that something far more sinister is going on. Has a 74-year-old serial killer resumed his old activities? And what is BJ's connection to the case?
- Asshole Victim: Rapist and serial killer Harry Cokely receives poetic justice when he is murdered by his granddaughter in the same fashion he murdered others, while begging pathetically for mercy.
- Child by Rape: BJ's father was one. His mother was raped by a serial killer, but she survived and had his child. She put him up for adoption.
- Genetic Memory: One of the more ridiculous uses of the trope.
- Getting Crap Past the Radar: "Yes, and also I've always been intrigued by women named B.J."
- Jerk with a Heart of Gold: Tillman becomes very snippy once BJ reveals her pregnancy, but he still tries to protect her while she begins slipping into insanity and even petitions to adopt the baby after she attempts to abort it in prison.
- Office Romance: BJ, a female detective, has an affair with her lieutenant, who is married. She gets pregnant from him, but these are only minor problems... She starts channeling her grandfather, serial killer Harry Cokely. She ends up suicidal and tries to abort her son. Lieutenant Tillman petitions to adopt the child (it's unknown whether his wife knew about the affair or if they even stayed together).
- Sanity Slippage: BJ.
- Serial Killer: Harry Cokely, a.k.a. the Slash Killer, who rapes and kills women, and also has killed FBI agents who investigated the case.
- Show Within a Show: Cokely is watching His Girl Friday on television when BJ confronts him.
- Trademark Favorite Food: Mulder's sunflower seeds are back, and he even tries to explain the case with them. What if he likes them because his father liked them as well, and he's predisposed to like them, hum?
- Your Cheating Heart: Tillman is unfaithful to his wife, and his lover gets pregnant.