"Don't I Know You?" is the third episode of the BBC America television show Killing Eve. It aired on 22 April 2018 in the United States and 29 September 2018 in the United Kingdom.

Villanelle, birth name Oxana Vorontsova or Oksana Astankova is a fictional character in Luke Jennings' novel Codename Villanelle (2018), its sequels Killing Eve: No Tomorrow (2019) and Killing Eve: Die For Me (2020), and the BBC America television series adaptation Killing Eve (2018–2022) in which she is portrayed by English actress Jodie Comer. She is a psychopathic assassin who works for a crime syndicate called The Twelve, and the archenemy of British intelligence agent Eve Polastri. Their mutually obsessive relationship is the main focus of both the novels and the TV series. The character and Comer's performance have received universal critical acclaim, with Villanelle widely being considered the show's breakout character and one of the most popular and acclaimed characters on television.