Assignment Outer Space (1960)

From IMDb: In the 21st century Ray Peterson, reporter for the Interplanetary News, is assigned to write a story aboard a space station. Tension mounts between Peterson and the station commander, who believes he is in the way, but has orders to leave him alone. Errant spaceship Alpha Two enters the solar system and its photon generators are radiating enough heat to destroy Earth as it approaches. It falls to Peterson to try to figure out a way to enter the spaceship, disarm the generators, and escape before suffocating.

Space Men (released in the USA as Assignment Outer Space) is a 1960 science fiction film starring Rik Van Nutter and directed by Antonio Margheriti. It follows an assignment by Interplanetary News reporter Ray Peterson aboard a space station in the 21st century. Despite problems with the base commander, he is eventually responsible for stopping a space ship which threatens to destroy the Earth.
The film was released in the United States as part of a triple bill with the East Germany film First Spaceship on Venus and the Japanese film The Mysterians. It was director Antonio Margheriti's first assignment, and this film showed what quality he could deliver while working with a minuscule budget.

From publicdomainmovies.net