 Why doesn't the crew throw Moran out of the airlock?
I. Moran cut apart the yard-long monstrosity with a slash of flame. Moran, naturally, did not mean to help in the carrying out of the plans which would mean his destruction one way or another. The plans were thrashed out very painstakingly, in formal conference on the space-yacht Nadine , with Moran present and allowed to take part in the discussion. From the viewpoint of the Nadine's ship's company, it was simply necessary to get rid of Moran. Now it lay astern, and Moran could see the planet that had been chosen for his marooning. The ice-cap, by its existence and circular shape, proved that the planet rotated at a not unreasonable rate. A water-ice ice-cap said that there were no poisonous gases in the planet's atmosphere. But since there were ice-caps there would be temperate regions. In short, the ice-cap proved that a man could endure the air and temperature conditions he would find. Moran observed these things from the control-room of the Nadine , then approaching the world on planetary drive. Two of the Nadine's four-man crew watched out the same ports as the planet seemed to approach. They'd been on Coryus Three and they'd gotten departure clearance from its space-port. With clearance-papers in order, they could land unquestioned at any other space-port and take off again—provided the other space-port was one they had clearance for. Without rigid control of space-travel, any criminal anywhere could escape the consequences of any crime simply by buying a ticket to another world. Moran couldn't have bought a ticket, but he'd tried to get off the planet Coryus on the Nadine . The trouble was that the Nadine had clearance papers covering five persons aboard—four men and a girl Carol. Wherever the yacht landed, such a disparity between its documents and its crew would spark an investigation. Moran, at least, would be picked out as a fugitive from Coryus Three. In effect, with six people on board instead of five, the Nadine could not land anywhere for supplies. Blaster in hand, he'd made the Nadine take off from Coryus III with a trip-tape picked at random for guidance. But the trip-tape had been computed for another starting-point, and when the yacht came out of overdrive it was because the drive had been dismantled in the engine-room. A liner could re-locate itself without trouble.
 They are not murderers.
 They are not murderers.  They do not want to be accused of aiding and abetting.  The crew will alert the authorities when they reach Loris. Moran will be brought to justice for his crime.  They are marooning him as punishment for murder.