A scientist is forced to work for a dictator but, instead of creating an invisibility ray as ordered, creates a teleportation ray that banishes his top officers and allows a revolution.; A space explorer ignores his partner's caution and leads a party out into a seemingly safe world. They all disappear, captured by intelligent trees, and the more cautious explorer rescues them.; A Martian spy is sent to sabotage a human rocket, but he destroys a toy instead, since Martians are only an inch tall.; A ham radio operator believes he is receiving reports of an extraterrestrial battle, but he is actually receiving the thought waves of ants.; A man writes anti-robot articles about his replacement at a factory by a robot. He becomes a famous writer, and realizes that the robot actually freed him to pursue his true calling.