of her future with the FBI. Mulder is convinced that her condition is a result of her earlier abduction ("Ascension"), and is prepared to make a deal with the Syndicate to find a cure. He is dissuaded by Walter Skinner (Mitch Pileggi), who secretly makes such a deal instead. While being pursued by an assassin responsible for a hoax alien corpse discovered on a mountaintop, Mulder fakes his own suicide, mutilating the assassin's face to provide a decoy body. He uses the distraction this offers to infiltrate The Pentagon to find a cure for Scully's cancer, while Scully is able to uncover and reveal a Syndicate connection within the FBI. Production Writing The season saw drastic changes to the series' alien mythology. In the premiere episode, "Herrenvolk", Williams—the actor who played Mulder's informant X—was written out of the show. He said that, "Carter called me up personally [and said] 'Got good news, got bad news. The good news is we're gonna bring you up for another episode this week. The bad news is you're gonna take a bullet." The writers created a new character, Marita Covarrubias, to function as Mulder's informant. Carter felt it would be "more interesting for Mulder's next contact to be a woman", noting that he "wanted there to be some suspicion about whether Mulder would become involved with her romantically. "Herrenvolk" also introduced the killer bees, who would go on to play a larger part in the 1998 film. Carter described the fourth season as "maybe the most intense and difficult season of the show." The season is notable in that it introduced a story arc about Scully developing terminal cancer, which would not be resolved until the beginning of the fifth season. The show's producers decided to give Gillian Anderson's character Dana Scully cancer early in the season. Carter initially discussed giving Scully's mother cancer but decided to have Scully suffer from it instead. Carter felt the move would give the show an interesting platform on which to discuss things such as faith, science, health care and a certain element of the paranormal. Some of the writing staff felt that the decision was a poor one to make, citing it as "a cheap TV thing". However, Frank Spotnitz felt that, given the appearances of cancer-stricken abductees in previous episodes, it was an "obligatory" move to have Scully follow suit. Following the cancellation of the Fox