Karl Gajdusek is an American screenwriter, producer, and playwright. He was the showrunner for the first season of the Netflix series Stranger Things and the co-creator of the TV series Last Resort with Shawn Ryan. They were both also executive producers for the series. Gajdusek also wrote for the series Dead Like Me and wrote the film Trespass (2011). He co-wrote the screenplay for the 2013 Tom Cruise movie, Oblivion, and The November Man, which was released in 2014.