The Scooby Gang, or "Scoobies", are a group of characters in the cult television series and comic book Buffy the Vampire Slayer who battle the supernatural forces of evil. The team consists of Buffy Summers and her friends and colleagues who assist her in her duties as the Slayer. First forming in the Season One episode "The Harvest" to prevent The Master from opening a portal to hell, the line-up of the group varied from year to year, but the core that remained intact throughout the series' run was Buffy herself and her best friends, Xander Harris and Willow Rosenberg, as well as her Watcher, Rupert Giles. This group was also called the "slayerettes."The group was first referred to as the Scooby Gang by Xander Harris in the Season Two episode "What's My Line, Part One" as a reference to t