"Gethsemane" is the twenty-fourth and final episode of the fourth season of the American science fiction television series The X-Files. It premiered on the Fox network on . It was directed by R.W. Goodwin, and written by series creator Chris Carter. "Gethsemane" featured guest appearances by Charles Cioffi, Sheila Larken and Pat Skipper, and introduced John Finn as recurring character Michael Kritschgau. The episode helped to explore the overarching mythology, or fictional history of The X-Files. "Gethsemane" earned a Nielsen household rating of 13.2, being watched by 19.85 million people in its initial broadcast. The show centers on FBI special agents Fox Mulder (David Duchovny) and Dana Scully (Gillian Anderson) who work on cases linked to the paranormal, called X-Files. In the episode, Mulder is shown evidence of alien life which may actually be part of a huge government hoax designed to deflect attention from secret military programs. Meanwhile, Scully struggles with her cancer in the face of hostility from her brother, who believes she should no longer be working. "Gethsemane" was filmed on one of the series' most elaborate and costly sets, replicating an icy mountaintop inside a refrigerated building using real snow and ice. Shooting for exterior scenes took place on Vancouver's Mount Seymour, occurring just a week before Duchovny's wedding. The episode, which has been described by Carter as pondering "the existence of God", has received mixed responses from critics, with its cliffhanger ending frequently being cited as its main failing. Plot The episode opens in medias res to police investigating a dead body in the apartment of FBI agent Fox Mulder (David Duchovny). Dana Scully (Gillian Anderson) confirms the unseen body's identity and leaves. She subsequently appears before an FBI panel led by Section Chief Scott Blevins (Charles Cioffi), reviewing her work with Mulder on the X-Files. In Canada's St. Elias Mountains, a frozen extraterrestrial body is discovered by an expedition team. Professor Arlinsky, the team's leader, sends ice core samples containing presumably alien DNA to Mulder. Scully has the samples tested and confirms the DNA's non-terrestrial origin, but is attacked by a man who steals the samples. Scully learns that her attacker is Michael Kritschgau (John Finn), a Defense Department employee. When she tracks down Kritschgau and holds him at gunpoint, he reveals that he might be killed. Meanwhile, Arlinsky returns to the mountains with Mulder, but they find that most of the expedition members