In this satire of 1950s sci-fi matinees, Lou Costello plays an amateur scientist who invents a time machine that also has a way of changing people into strange things as it moves them through time.
In the late 19th century, Captain Robur, a mad scientist, kidnaps a team to investigate a mysterious crater in Pennsylvania. He decides to destroy weapons of mass destruction to bring world peace.
Ben Harris and Harold Tufnell-Jones are rescuers and British nationals who do their best to rescue a woman from Sir Hugh, the captain of an underwater establishment.