Tuck Milligan

When a prominent doctor is murdered and his wife (guest star Lisa Eichhorn) is raped, Detectives Benson (Mariska Hargitay) and Stabler (Christopher Meloni) look to the dead man's estranged and troubled son from a previous marriage and a disgruntled former patient as likely suspects. But when the same rapist attacks the dead doctor's former mistress (guest star Liza Weil), a complicated series of relationships and events begins to unfold, as both the wife and mistress face unexpected scrutiny.

It's decision time for Detective Carter. When Carter finally comes face-to-face with Reese, he urges her to join forces to help with their latest POI, a scrappy young woman from the wrong side of the tracks who turned her life around and became a lawyer.

Mulder and Scully are stalked by a deadly new life form that has invaded the bodies of a volcanic research team.

Flashbacks to Finch’s adolescence provide insight into his creation of The Machine. Also, the team receives the number of an already dying man, and Reese leaves the POI team behind in the aftermath of the war with the crime organization, HR. Camryn Manheim and Saul Rubinek guest star.

In the concluding chapter to the shocking winter cliffhanger, multiple enemies converge on the POI team as they protect a dying man whose number has come up. They struggle to keep their enemies at bay but without Reese, who has left them and their mission behind following the tragic war with HR, being down one man could have catastrophic repercussions for the team.