In the Planet of the Apes movie series, Dr. Otto Hasslein is a physicist attached to the space flight project that sends astronauts Taylor, Dodge, Landon, and Brent to the world of the apes. He was portrayed as the main antagonist in the third Apes film, Escape from the Planet of the Apes, by German American actor Eric Braeden. In the novelization of the film, his first name is Victor. Even before appearing onscreen, Hasslein's name is part of the series storyline, as the scientist who proposed the "Hasslein curve" – a form of time dilation possible with the craft used in the movies.