Кімсің сен? (Kimsiŋ sen?)

"Who Are You?" is the sixteenth episode of the fourth season of the American supernatural drama television series Buffy the Vampire Slayer. It was written and directed by series creator Joss Whedon and originally aired on The WB on February 29, 2000. In the series, Buffy Summers (Sarah Michelle Gellar) is a Slayer, a teenage girl endowed with superhuman powers to fight evil forces. "Who Are You?" is the second half of a two part story arc featuring the return of the rogue Slayer Faith (Eliza Dushku) and is a turning point in the character's redemptive arc. The previous episode saw Faith use a magical device to swap bodies with Buffy, and Whedon wanted to use this premise to explore Faith's psyche and give her a moral epiphany. In Buffy's body, Faith experiences love and acceptance from others and realizes how unhappy her own life is. Initially dismissive of Buffy's morality, Faith also comes to appreciate a Slayer's duty to protect others. Whedon used the phrase "Because it's wrong", said by Faith mockingly at first but with full conviction by the end, to convey her psychological transformation. In the series, Buffy Summers (Sarah Michelle Gellar) is a Slayer, a teenage girl endowed with superhuman powers to fight vampires, demons and other evil forces. With her mother Joyce (Kristine Sutherland), she moves to the fictional town of Sunnydale where she befriends Willow Rosenberg (Alyson Hannigan) and Xander Harris (Nicholas Brendon), both of whom help her in the fight against evil. They are guided by Buffy's Watcher, Rupert Giles (Anthony Stewart Head). The group collectively refer to themselves as the Scooby Gang. In season three, Faith (Eliza Dushku) is introduced as a new Slayer with a rough upbringing. Faith originally joins the Scooby Gang but betrays Buffy to team up with the evil Mayor (Harry Groener). Buffy and Faith fight in the season finale, which ends with Faith falling into a coma. In season four, Buffy discovers a covert military organization called the Initiative that captures and performs experiments on vampires and demons. One of their experiments is a monster known as Adam (George Hertzberg) who turns on them and escapes. Buffy also begins dating Initiative commando Riley Finn (Marc Blucas), while Willow grows closer to fellow witch Tara Maclay (Amber Benson). In the preceding "This Year's Girl", Faith awakens from her coma and uses a magical device to swap bodies with Buffy, unbeknownst to everyone else.

Following their fight, an unconscious Buffy (in Faith's body) is taken into police custody. Faith (in Buffy's body) settles into Buffy's home, giving her new body a makeover, and then using Joyce's credit card to book a plane ticket out of Sunnydale. Buffy is being transported by the police when a Watchers' Council retrieval team attacks and abducts her. Meanwhile, Faith skirts Buffy's Slayer duties and goes to the Bronze to party. She runs into Willow who introduces Tara to "Buffy", only for Faith to make fun of Tara. To keep up the pretense of being Buffy, Faith saves a woman from a vampire attack and is taken aback by the woman's gratitude. Afterwards, Faith heads to Riley's dorm and tries to initiate kinky sex with him. Riley insists on being gentle with her, and they have sex. He tells her he loves her, which sends Faith into a panic. Back in her dorm, Tara realizes something is wrong with "Buffys aura, and she and Willow perform a ritual to find the real Buffy. Meanwhile, Buffy escapes from the Council's captivity and heads to Giles's house, where Willow and Tara give her a magical device they conjured that can switch the Slayers' bodies back. Inspired by Adam to face their fears, a group of vampires attack a church and hold its congregation hostage. Faith is about to board her flight at the airport when she sees a news report about the hostages. She goes to the church where she is able to kill most of the vampires and save the hostages. Faith is nearly overpowered by the last vampire when Buffy shows up and saves her. With the vampires gone, Buffy and Faith fight. Using Willow and Tara's device, Buffy is able to restore herself and Faith to their rightful bodies. Faith escapes and leaves town.

"Who Are You?" is the sixteenth episode of the fourth season of Buffy, and the seventy second episode of the series overall. The actresses did not get to watch each other's performances when they were filming, and Dushku said both she and Gellar had to place a lot of trust in Whedon, the show and the writing. For this episode, Whedon wanted to explore what would happen if an embittered person like Faith was given the opportunity to ruin her nemesis Buffy's life but instead found her own self concept shattered through the experience of being Buffy. Whedon explained that the phrase "Because it's wrong" was specifically written to convey the character's psychological transformation. Faith initially uses this mantra to mock Buffy's morals, first when practicing being Buffy in front of a mirror and then again when taunting Spike, but by the end she is saying it with complete sincerity as she confronts the vampires in the church. For producer Marti Noxon, the episode was also about the importance of love, and exploring what could have been had Faith been raised in a loving environment like Buffy. The episode also continues the writers' theme of using witchcraft as a metaphor for Willow and Tara's romantic relationship. The scene in which they cast a spell together was intentionally written and shot by Whedon to represent their first time having sex. "Who Are You?" originally aired on The WB on February 29, 2000.

"Who Are You?" is a turning point in Faith's redemptive arc. Elyce Rae Helford, an English professor and women's studies researcher, says this arc focuses on Faith's anger as it "shifts from externalized rage with underlying self doubt to vicious and unrelenting self hatred".

The original broadcast was watched by 4.9 million viewers, making it the 86th most watched prime time network television program for the week of February 28 to March 5, 2000. In Jack Francis's ranking of all 144 Buffy episodes for Rolling Stone, "Who Are You?" placed 13th with Francis calling it "a beautiful and devastating arc for one of the show's most complex characters". The Mary Sue Lauren Coates said this "beautifully and brutally written" look into Faith's insecurities and fears would not have been possible without the body swap premise. In his review for The A. V. Club, Noel Murray emphasized Whedon's ability to turn the comedic scene in which Faith mocks Buffy in front of a mirror, into a touching character moment by the episode's end. GamesRadar+ Ian Sandwell and Den of Geek Michael Mammano included "Who Are You?" in their lists of the 25 best Buffy episodes; both thought the episode went beyond the typical body swapping hijinks to deliver some insightful character development for Faith. Paste Mark Rabinowitz wrote that when watched together with "This Year's Girl", the two parter is the "gold standard" for body swapping storylines. Gellar and Dushku's performances as each other's characters have been repeatedly described as among the best acting of the series. Coates said it was their acting that truly elevated the episode, citing Dushku's "remarkable" embodiment of Buffy's physical and vocal inflections, as well as the comedic and dramatic range that made Gellar the "unquestionabl[e]" standout. Writers at Vox ranked "Who Are You?" as the 18th best Buffy episode, with Caroline Framke praising Gellar's ability to embody Dushku's body language without crossing the line into mimicry. For Mammano, the acting was commendable for the most part, but there were some out of character moments that were very jarring. Other publications also included "Who Are You?" in their retrospective lists of the best Buffy episodes, including The Guardian Rebecca Nicholson (ranked 4th), and Screen Rant Julia Tilford (top 20). Besides the acting, Tilford took note of the standout dialogue and important character interactions. Some commentators found the FaithRiley sex scene problematic in retrospect, citing Buffy and Riley's lack of informed consent. Screen Rant Suzana Mihurko was irked that the show never acknowledges the sexual assault,