This film showcases the flight of the Mariner 10 spacecraft to Venus and Mercury is detailed in animation and photography. It features views of Mercury, as well as an animation on the origin of the solar system. Dr. Bruce C. Murray, director of the Jet Propulsion Laboratory, comments on the mission.

NASA documentary from 1969 about the Mariner 6 and 7 missions to Mars. Reception of the first detailed images of the Martian surface is shown, along with scientists' reactions and early scientific results.