Villain galleries, sometimes referred to as rogue galleries, are a collection of villains that reappear throughout a given show, comic, or manga, rarely dying, and always coming back for more. The Batman franchise is known for its epic villain gallery, with characters like Ra's al Ghul and Joker reoccurring throughout the franchise's history, with different plots and schemes to take over the world, take out Batman, and cause trouble in general. This plot device is set in contrast with the "Monster of the Week" option, in which the protagonist has a new "bad guy" to fight every episode. Viewers see this in Buffy the Vampire Slayer and some filler episodes of popular anime like Naruto. Oftentimes, a combination of both devices is used.