Witness the NASA expedition of Viking1 and Viking2 to the red planet known as Mars. As well as exploration, their mission is to search for life, in the form of micro organisms. This is to be America's first hands-on study of the planet, and we hear top NASA scientists give their views on the possibility of life on other worlds. Since the earliest of times, man has been interested in the heavens. Mars was named after the God of War, because its red hue was reminiscent of blood. Early astronomers believed that the Martian surface was similar to that of Earth, and as such could indeed be habitable. This programme includes previously unseen footage of robot exploration, bringing us closer to the secrets of this mysterious planet, and perhaps the universe itself.