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Glenn Cannon is a Hawaii-based actor and educator best known for his roles on Hawaii Five-O and Magnum, P.I. More recently, he has been featured on Lost in a pair of different roles. Cannon's career stretches back to the 1950s with roles in shows like Alfred Hitchcock Presents, The Outer Limits and Combat!. On Magnum, P.I., Cannon was featured as Dr. Ibold, while on Hawaii Five-O, he played Attorney General John Manicote. In recent years, he has served as president for the Hawaii chapter of the Screen Actors Guild. He is a Professor of Theatre and the co-Director of the Cinematic and Digital Arts program at the University of Hawaii at Manoa.