Bob (sometimes known as BOB or Killer BOB) is a fictional character in the ABC television series Twin Peaks, played by Frank Silva. He is an interdimensional entity who feeds on pain and sorrow. An inhabiting spirit, he possesses human beings and then commits acts of rape and murder in order to feast upon his victims. Bob made his first appearance in the pilot episode, "Northwest Passage", where he makes a brief appearance in a vision Sarah Palmer has. The character eventually grew into the series' main antagonist in the second season. Silva, a set dresser on the pilot, was given the role of Bob after a reflection of his face in a mirror was accidentally captured by the camera during filming. When series creator David Lynch saw Silva's face, he liked it so much he kept it in the show, and cast him as Bob. Although he died before production on the 2017 revival began, he appears in the series through archival footage. In 2016, Rolling Stone ranked him No. 5 of their "40 Greatest TV Villains of All Time". Character arc Twin Peaks Bob is an interdimensional entity from the Black Lodge, a realm which exists on an alternate plane of reality. While "possessing" humans, he commits horrible crimes to elicit pain, fear, and suffering in those around him. During his investigation of Laura Palmer's (Sheryl Lee) murder, FBI Special Agent Dale Cooper (Kyle MacLachlan) first learns of Bob's existence in a vision, in which he encounters another entity named Mike (Al Strobel). In this vision, Cooper learns that Bob was in life a serial killer who raped and murdered young women, with Mike as his accomplice. Mike eventually repented, removing his left arm in order to be rid of the tattoo that he shared with Bob. At the beginning of the second season, one of Bob's intended victims, Ronnette Pulaski (Phoebe Augustine), awakens from a coma induced by her torture at Bob's hands, at which time she identifies Bob as Laura's killer. Cooper and the Twin Peaks Sheriff department canvass the town with wanted posters of Bob. Leland Palmer (Ray Wise), Laura's father, identifies the man in the poster as "Robertson", and says that he lived near his grandfather and used to taunt Leland when he was a child. It is later revealed that Bob is, in fact, possessing Leland, and has been "possessing" him ever since