‘Doomsday Gun’

Full of real-life mystery and shady government dealings, this 1994 HBO production revolves around Canadian arms designer and dealer Gerald Bull, who was assassinated in 1990 while building a “super gun” for Iraqi leader Saddam Hussein. Had it been completed, the gun, with its nearly 200-yard-long barrel, would have been the largest weapon of its kind. Frank Langella (pictured) is transfixing as the naive, single-minded Bull.