Rocketship X M

Rocketship XM aka Expedition Moon and originally as Rocketship Expedition Moon is a 1950 American blackandwhite science fiction film from Lippert Pictures, the first outer space adventure of the postWorld War II era. The film was produced and directed by Kurt Neumann, and stars Lloyd Bridges, Osa Massen, John Emery, Noah Beery, Jr., Hugh OBrian and Morris Ankrum.

After the explorers find cave refuge for the night, they notice in the distance the primitive descendants of that civilization emerging from behind boulders and creeping toward them. Amazed, Dr. Eckstrom comments From Atomic Age to Stone Age. Soon after leaving, two of the explorers encounter a darkhaired woman who has lost her footing and rolled down a hill toward them she is blind, with thick, milky cataracts on both eyes. She screams at the sound of their oxygen mask muffled voices. They retreat, and she is quickly led away by two bald tribesmen with severe radiation burns. The primitives then attack, throwing large rocks and stone axes. Armed with only a boltaction .3006 rifle and .38 caliber revolver, the explorers defend themselves, purposely missing their pursuers. Two are killed during the ensuing pursuit, including Dr. Eckstrom, felled by a stone axe another is badly injured by a large thrown rock. The survivors eventually make their way back to the RXM.The return voyage proves disastrous. The RXM returns to Earth, but the survivors calculate they have inadequate fuel for a landing. Col. Graham contacts their White Sands base and reports their dire status to Dr. Fleming Morris Ankrum, who listens intently and wordlessly over his headphones. Col. Grahams report is not heard, but Flemings subtle reactions tells of the crews odyssey, their discovery on Mars of a once advanced civilization destroyed long ago by atomic war, and of the crew fatalities at the hands of Martian descendants reverted to barbarism. ........

Source: Wikipedia