Morrey, Serge and Tony are sent to Mars to investigate the murder of William Baines, an electronics specialist who has been found dead in a crater. There are more than a hundred people working in Mars city, and at first the astrotecs, as Commander Morrison calls them, see no reason to suspect one more than another. However, investigations on the spot soon narrow down the field to a few suspects, and gradually all the clues begin to point in one direction. Morrey and Serge are sure that the case is solved, but Tony still has doubts, and he decides on an independent - and dangerous - piece of detective work.
More space sleuthing for Morrey, Serge, and Tony as they investigate a murder on Mars. Supposedly, it's the first murder in space, but Hugh conveniently forgot all about Jan Hendriks, LOL. It's an okay mystery, although the ultimate culprit isn't obvious enough, and Tony has to do all the hard work even though Morrey is nominally in charge. Serge is mostly window dressing, sigh. Finally, Morrey is a massive idiot at the very end, which knocks off a star.