Zeke Jones, a scientist, receives a distress signal from the Dog Star Sirius. Flying to Sirius using a sphere of his own invention, he helps the local population repel an onslaught of intelligent Dinosaurs that have been spreading terror across their land.; Frank Hanson is put under hypnosis by a hypnotist named Thorko on an ocean cruise. This incredibly causes a double of himself to form. This double then tries to live Frank's life getting him into all sorts of trouble. Eventually Frank's wife Alice, drugs the double with spiked tea. When the double falls unconscious it ceases to exist.; Mary, a reporter, becomes smitten with a man named Thoron the Great. Thoron is a great illusionist who can do almost supernatural things. It turns out he is actually an alien from the planet Asperia who was simply vacationing on Earth.