BEYOND MARS was a Sunday comic strip written by Jack Williamson and drawn by Lee Elias. It ran exclusively in the New York Sunday News from February 17, 1952, to May 13, 1955, at first as a full tabloid page and, near the end, as a half tab. It is set in the same universe as the Williamson science fiction novels Seetee Shock and Seetee Ship.

The setting was the Asteroid Belt, between Mars and Jupiter, in the year 2191, with artificial gravity enabling people to live normal lives on the surface of rocks not much larger than an Earth mountain. Power was provided by what Williamson had dubbed "seetee" in several of his stories — "C.T." standing for "contraterrene" matter, which physicists usually call "antimatter", a substance that provides a tremendous burst of energy when it comes into contact with ordinary matter. The hero, Mike Flint, and his sidekick, a vacuum-breathing, rock-eating alien named Tham, were based on Brooklyn Rock, where Mike lived with his Ma, but their adventures ranged throughout the Solar System.

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