Haredevil Hare.The cartoon opens with the newspaper headlines "Scientists to Launch First Rocket to Moon" and "Heroic Rabbit Volunteers as First Passenger." However, the scene then changes to Bugs literally being dragged across the launching pad to the waiting rocket as he frantically protests against what is to be expected of him, but then immediately becomes cooperative when he sees the rocket being loaded with carrots. The rocket is then launched into space. Shocked by the sudden acceleration of the rocket, Bugs attempts to exit it, but when he opens up the hatch, he is horrified when he sees that the rocket has now already left Earth. When the rocket lands on the Moon, Bugs completely goes to pieces, but quickly regains his composure as he starts to walk on the surface of the moon, contemplating the fact that he is the first living creature to set foot on it, while passing behind a large rock on which the words "Kilroy was here" are written. Another rocket soon lands nearby, called the Mars to Moon Expeditionary Force from the planet Mars, and from it emerges an unnamed Martian (later known as Marvin the Martian), who begins work on something that involves a missile and clearly concerns Earth. Curious, Bugs asks Marvin what he is up to, and Marvin explains he is there to blow up the earth. Bugs is initially not concerned, until he realizes the severity of the situation and steals from Marvin the missile's fuel source, a Uranium PU-36 Explosive Space Modulator, a small device resembling, and that operates the same as, a mere stick of dynamite. He shortly has to then deal with Marvin's Martian dog, named K-9, who, as ordered to by Marvin, retrieves it while Bugs is distracted trying to send an SOS to Earth. In one of his classic word switcharoos, and after that through flattery, which the dog is absent-mindlessly, extremely prone to, Bugs successfully gets the Uranium PU-36 Explosive Space Modulator back...