As Jack Tripper on Three's Company, John Ritter established himself as one of the most gifted comedians of a generation, launching a prolific career in television and movies that would make him one of America's most beloved stars. But for a man so brilliant in comedy it was the tragedy of an undiagnosed aortic aneurysm that would cut his life short at just 54 years old. Through personal stories told by his closest friends and co-stars including Suzanne Somers, Joyce DeWitt, Henry Winkler, Peter Bogdanovich, Jimmy Kimmel and Kaley Cuoco, John Ritter: Behind Closed Doors reveals the generous spirit behind Ritter's undeniable talent, his legacy of laughter and his family's determination to save lives by raising awareness of the condition that caused his death.