"Not What He Seems" is the eleventh episode of the second season of the American animated television series Gravity Falls, created by Alex Hirsch. The episode was written by Shion Takeuchi, Josh Weinstein, Jeff Rowe, Matt Chapman, and Hirsch, and directed by Stephen Sandoval. The series follows twelve-year-old twins Dipper (voiced by Jason Ritter) and Mabel Pines (voiced by Kristen Schaal), who stay for the summer with their grand uncle Grunkle Stan (voiced by Hirsch) in a tourist trap called the Mystery Shack, set within the fictional town of Gravity Falls, Oregon. In this episode, Dipper and Mabel begin to question who Stan really is after officers arrest him for stealing chemical waste. The episode, which breaks the show's status quo by revealing Stan's brother, ends with a cliffhanger