The Killer in Me
"The Killer in Me" is the 13th episode of the seventh and final season of the television series "Buffy the Vampire Slayer". Plot. Giles prepares to take all of the Potentials – except Kennedy, who is sick with the flu – on a trip to the desert to meet the First Slayer. Buffy goes to check on Spike, who is determined to remain chained in the basement until they know the First Evil is through with him. Suddenly, Spike begins to writhe in pain as his chip begins firing randomly without provocation. As Buffy and Spike talk about  the potential causes of the chip's glitches, Buffy realizes that she will have to contact the people who implanted the chip in the first place: the Initiative. After failing to reach Riley Finn on the phone, Buffy and Spike go to the Initiative's abandoned base to look for the painkilling drugs that were used on Spike during his captivity there three years before, when the chip was implanted, and for documentation on the chip. Buffy and Spike wander through the remains of the Initiative, finding many dead soldiers and demons. Inside the Initiative's base, Buffy and Spike  are attacked by a demon. During the fray, Buffy is wounded by the demon and when Spike tries to help, his chip fires and renders him ineffectual. As the demon grabs Spike and tries to drag him away, Buffy battles with and finally kills the demon. As she crouches down by Spike to see if he is okay, lights turn on, revealing a group of soldiers. Their leader explains that Riley received Buffy's message, and they are there to help Spike. An examination confirms that Spike's chip is killing him, and Buffy must decide whether to repair the  chip or remove it. When Willow goes upstairs to bring Kennedy some tea, she finds that Kennedy is not actually sick, and is instead dressed for a "mission" which she says requires Willow's assistance, involving drinks at The Bronze where they get to know each other. After leaving the bar and returning home, Kennedy gives Willow an end-of-date kiss, with a surprising effect: Willow takes on the appearance of Warren Mears. Panicking, Willow rushes downstairs; on seeing her, the others recoil, partly because they know that the First has appeared to Andrew as Warren. Buffy hits "Warren , showing that he" cannot be the First, who is incorporeal. When Willow threatens to tell some embarrassing old stories about Xander, the gang provisionally accept her claim. As Willow and Kennedy attempt to break the spell, Robson, a Watcher, calls Buffy's house from England and reports that Giles may have been killed by a Bringer who had attacked him in London several weeks before. The Scoobies become alarmed when none of them can remember seeing Giles touch or carry anything since his return; no one has hugged him, and he is not driving the car to the desert . Xander, Anya, Dawn, and Andrew all go to the desert to find Giles and, in the case of danger, stop him from hurting the Potentials. Giles is tackled to the ground by the others, who are all pleased to find that he has a solid form and thus is not the First – or dead. Willow and Kennedy meet with the Wiccan group at the UC Sunnydale, which now includes Amy. Willow runs away as she realizes she is starting to behave like Warren. Kennedy tries to follow, but Willow puts up a magical barrier to keep her away. After the  meeting, Kennedy returns to the lecture hall to find Amy packing up as the rest of the group has left. Amy comments on Kennedy's concern for Willow, and draws Kennedy's suspicion when she mentions that Kennedy is a Potential, a fact that neither Kennedy or Willow had mentioned. Willow, increasingly dominated by the Warren persona, goes to buy a gun of the same model that killed Tara and wounded Buffy. Kennedy confronts Amy, accusing her of causing the "Warren" problem. Amy reveals that she put a hex on Willow, whose effect is determined by the victim's subconscious . She did it because Willow murdered a man and remained beloved – crowning Amy's envy of Willow's relatively easy successes in magic. Amy then teleports Kennedy to the backyard of Buffy's house, where Willow starts to reenact Warren's attack on Buffy that resulted in Tara's death, but Kennedy talks her down. Willow tearfully explains that when Kennedy kissed her she let go of Tara's memory for a moment, making her truly dead. Then Kennedy kisses Willow again, breaking the spell and restoring Willow to normal. Production details. Writing. Each scene with Willow/Warren was filmed  twice - once with Alyson Hannigan playing Willow and again with Adam Busch as Warren. Which actor performed the scene first depended upon how "Willow" Warren was supposed to be. That is, when Willow first changes into Warren she acts more or less like Willow; in these early scenes Hannigan would act first so that Busch could somewhat mimic her performance. In later scenes when Warren's personality is more prominent Busch would act first. Because of this decision to use both actors, filming the Willow scenes took much longer than usual. In an interview with the BBC, Elizabeth Anne Allen  says, "everything had to be so exact." She explains that if Alyson or Adam "gestured or moved their head differently from the other person, they had to do the take over again. So that one scene took us a day and a half to shoot." Anthony Stewart Head was not allowed to touch anything while onscreen for several episodes prior to this one, in order to set up the suspicion that Giles might actually be the First. According to the DVD commentary for this episode, this was apparently quite a pain for all involved. When asked why he set up  this misdirection, Joss Whedon says it was "to make people wonder. Just to have a little fun in the sense of pulling a mystery... an exercise, something to spice things up." Whedon wanted to play off the "creepy" idea that "we don't know where the bad guy is, we don't know where he's coming from. Our trusted mentor could be the bad guy." In the DVD commentary, director David Solomon notes that Iyari Limon had to do a lot of kissing in this episode. He says she joked that her lips hurt after having to do long  kisses with both Alyson Hannigan and Adam Busch.