Attack from Space (1964)

Benevolent aliens from the planet Emerald send superhero Starman to protect Earth from invasion by an evil alien race called the Spherions.

Attack from Space is a 1964 film edited together for American television from the 1957 films #5 and #6 of the Japanese short film series Super Giant. It is currently in the public domain.
Plot
The superhero Starman is sent by the Emerald Planet to protect Earth from belligerent aliens from the Sapphire Galaxy. The Sapphireans (or "Spherions") kidnap Dr. Yamanaka and force him to use his spaceship against the Earth.
American adaptation
The nine Super Giant films were purchased for distribution to U.S. television and were edited into four films by Walter Manley Enterprises and Medallion Films. The two original Japanese films that composed Attack from Space (The Artificial Satellite and the Destruction of Humanity and The Spaceship and the Clash of the Artificial Satellite) were each 39 minutes in duration. The two films were edited into one 76-minute film, resulting in only two lost minutes in the combined edit. As a result, this compilation suffered least among the Super Giant films in its adaptation for American television. Although Riichiro Manabe composed the music to the original two films, most of the original music was replaced by library tracks in the American adaptation.

From publicdomainmovies.net