Game of Thrones star Nikolaj Coster-Waldau's next big project isn't for TV or the big screen. The Jaime Lannister actor is working on a new podcast called Mask of Sanity, which tells the true story of Bulgarian journalist Dimiter Kenarov's reporting on a serial killer. The twist is that Kenarov has a secret of his own that will unravel throughout the course of the show.

　　The new podcast series is a joint production of Audible, Big Light Productions, and Vespucci. Coster-Waldau is co-producing the new show through his Ill Kippers Production company.

　　"Mask of Sanity is a great example of the storytelling that [writing partner Joe Derrick] and myself want Ill Kippers to make. Entertaining, unexpected, and thought-provoking, keeping the audience guessing right to the end," he said, as reported by Deadline. "We are thrilled to be given the opportunity to work with the good people at Big Light Productions and Vespucci and can't wait to share it with listeners everywhere through Audible."

　　In addition to Mask of Sanity, Coster-Waldau is set to appear in the Netflix movie Against the Ice. The film tells the true story of a Danish captain who, in 1909, traveled to Greenland on an expedition only to run into a series of challenges, including a bear attack.

　　Podcasts continue to be a popular form of entertainment, with big names signing on for new projects all the time. Just recently, The Big Short's Adam McKay launched a podcast series called Death at the Wing about the intersection of sports and politics. Spotify, which recently spent $100 million to sign Joe Rogan's podcast, also made a deal with the directors of The Avengers for new podcasts and a separate deal for more shows based on DC Comics.