Just Another Dead Martian

An intelligence agent from Mars Security travels to Earth to thwart a revolution planned to coincide with an ancient doomsday prediction. It seems to vaguely mirror an attempted revolt some forty years before, but any connection to that earlier group seems tenuous.

The problem? It seems that the three leaders of the current revolt were killed ten years ago! And they were not look-alikes, the DNA is an exact match. While trying to make sense of the insanity, the agent discovers another death in the past: his own.

Aided by a newspaper woman on Earth, he culls the old records of the three cases and discovers that she, too, was killed some ten years before.

It is a race against time to stop the revolution and save their own skins, but he first has to uncover the traitor in the ranks of his own Intelligence Agency. And it seems to be someone who just happens to have a time machine.

And the person with the time machine seems to be staying one step ahead of them.