The Death Ray of Dr. Mabuse
Die Todesstrahlen des Dr. Mabuse (original)
The evil Dr. Mabuse develops a death ray with which he threatens the world.
Starring Peter van Eyck, O.E. Hasse, Yvonne Furneaux, Walter Rilla, Ernst Schröder, Dieter Eppler, Wolfgang Preiss, Rika Dialina, Robert Beatty, Valéry Inkijinoff
It's a crime and mystery movie, and has a rating of 4.7 out of 10 from Imdb which is fairly low for this kind of movie.
Watch it here
Not found streaming from Spain.