Full disclosure: Steven Spielberg’s aliens-are-totally-real conspiracy thriller is a muddle of hyperventilating car chases, childhood trauma-bonding, bad-guy government agents, unexplained doomsday hysteria, and maudlin extrasensory brief encounters. Plus, CGI animals that look like they came out of a Coca-Cola Christmas commercial. Why oh why is this the story that America’s maestro of mass entertainment felt he had to tell?