A scientist's formula makes an ant giant and super-intelligent. The ant wants to conquer the world, but is killed by a giant ant-eater.; In a black magic book, a thief finds instructions for creating a time machine which runs on electricity, but after robbing people in the 18th century and attempting to return to the 20th, he realizes he is stuck in the past because there is no electricity in the 18th century.; A Martian is sent to Earth to kidnap a human scientist who has invented a weapon that Mars wants to use against Jupiter. The Martian is beaten by the scientist, who turns out to be a Jovian agent setting a trap to capture a live Martian.