In his own words:  The cutaway illustration of Marvin made by Kevin J. Davies for the "Depreciation Society" featured a "rat cavity". As the menial labourer on the "Heart of Gold" spaceship, he grew immensely resentful of the insistence of his new masters (Zaphod Beeblebrox and Trillian; later also Ford Prefect and Arthur Dent) that he open doors, check airlocks and pick up pieces of paper. He reserved a particular contempt for the sentient doors, despising their blissful satisfaction with existence. When the "Heart of Gold" crew arrive on the ancient planet of Magrathea, they abandon Marvin on the surface. During an apparently suicidal confrontation with a pair of trigger-happy cops, the crew are teleported directly from Magrathea into the future to the Restaurant at the End of the Universe to find that, in fact, they haven't travelled an inch. The Restaurant was constructed on the ruins of the planet they had just left, and, while there, they find Marvin, who had been waiting patiently for their return for 576,000,003,579 years (he counted them). According to Marvin, "The first ten million years were the worst, and the second ten million years, they were the worst too. The third ten million I didn't enjoy at all. After that I went into a bit of a decline." Apparently, the best conversation he had was over 40 million years ago with a coffee machine. Deciding they had better leave, the crew make a desperate and futile attempt to engage Marvin's enthusiasm (he "hasn't got one") before he simply does what they really want and opens the door to the ship they want to steal. The ship turns out to be a Haggunenon battle cruiser, and the entire group, including Marvin, but excluding Ford Prefect and Arthur Dent, who escape, are eaten by its crew. Marvin's subsequent survival is never explained, but against all probability, he eventually finds himself on Ursa Minor Beta, just in time to rescue Zaphod from a robotic tank. A subsequent section of Marvin's biography occurs only in the Secondary Phase of the radio series. Marvin rejoins the crew on the "Heart of Gold", and using the improbability drive programmed by Zaphod Beeblebrox the Fourth, takes them to the ravaged planet Brontitall. Having landed in a giant floating marble copy of a plastic cup, the crew accidentally find themselves falling several miles through the air.