File:Tales to Astonish Vol 1 25 010.jpg

Description
A spy from Jupiter disguised as a human stows away on the first rocket from Earth to Mars. The pilot is a Martian spy disguised as Earthman Dan Blake whose mission is to radio back to Earth that a radiation belt with fatal effects makes attempting to reach Mars too dangerous so Earthmen will give up their attempts to reach Mars. The spy from Jupiter overcomes the Martian and radios Jupiter that travel to Mars is safe, and then radios the Martian's story back to Earth so as to discourage Earthlings from space flight.