"Nightmares" is the tenth episode of the first season of the television series Buffy the Vampire Slayer. The episode's teleplay was written by David Greenwalt, with a story by Joss Whedon, and directed by Bruce Seth Green. The episode originally aired on May 12, 1997, attracting a Nielsen rating of 2.5. The episode is about the students at Sunnydale High beginning to experience aspects of their worst nightmares while awake, leading the Scooby Gang's investigation to a young boy with a secret. However, before they can get to the bottom of things, they must face their own nightmares, which are rapidly taking over reality.