An inventor has built powerful "Mechanical Monsters", giant robots that fly like planes and open banks like cans. Of course, Lois Lane gets into trouble with a robot. Can Superman rescue her from the inventor's hideout? The design of the Mechanical Monsters is amazing as they tower over Superman with long clanky legs and arms they use to try to pound him into the dust. Also, they can shoot out fire, deflect bullets and turn into mini-airplanes! The machine gunfire showdown between a Mechanical Monster and the police and the battle between Superman and the army of Mechanical Monsters prove to be most entertaining and memorable. This is undeniably one of the best films from this series, which also served as inspiration for the popular "Sky Captain and the World of Tomorrow" feature film.