Regulus The First Nuclear Missile Submarines. Word Search Puzzle Solver. Regulus The First Nuclear Missile Submarines word Search Puzzle Game. Find words related to movie actors, actresses, and genres. Word Search Puzzle Solver. A documentary history of the development and deployment of the Cold War's ultimate weapon: the nuclear missile submarine. Features interviews with Navy veterans and footage never-before-seen by the public. This includes identifying and searching for words that are related to : History, Roy Scheider, War, Documentary .