Rocketship X-M (a.k.a. Expedition Moon and originally Rocketship Expedition Moon) is a 1950 American black-and-white science fiction film from Lippert Pictures, the first outer space adventure of the post-World War II era. The film was produced and directed by Kurt Neumann and stars Lloyd Bridges, Osa Massen, John Emery, Noah Beery Jr., Hugh O'Brian, and Morris Ankrum.

Plot

Four men and a woman blast into outer space from the White Sands Proving Ground aboard the RX-M (Rocketship Expedition-Moon) on humanity's first expedition to the Moon. Halfway there, after surviving their jettisoned and runaway first stage and a meteoroid storm, their engines suddenly quit. Recalculating fuel ratios and swapping around their multiple, different fuels corrects the problem, supposedly allowing continuing to the Moon. When the engines are reignited, the RX-M careens out of control on a rapid heading beyond the Moon. The increased acceleration causes the crew pass out. Reviving days later, they quickly discover that they have traveled some 50,000,000 miles; the RX-M is now just 50,000 miles away from Mars. Dr. Karl Eckstrom is forced to "pause and observe respectfully while something infinitely greater assumes control".