SolarmovieOne

A World War II Hollywood propaganda film detailing the dark underside of Nazism and the Third Reich set between two brothers, Kurt and Erik Franken, who are SS officers in the Nazi party. Kurt learns and exposes the evils of the system to Erik and tries to convince him of the immoral stance that marches under the symbol of the swastika.

How to Watch Underground Legally and Safely

If you want to stream Underground through reputable and legal services, there are a few good options depending on where you are. Subscription platforms like HBO Max, Disney+, Netflix, Amazon Prime Video, and Apple TV+ sometimes carry Underground films or related DC titles—though availability depends on your country.

If you’d rather not commit to a subscription, there are ad‑supported, free (but legal) platforms such as Tubi, Pluto TV, Peacock or Crackle (where available in your region) that occasionally host superhero films.

Lastly, don’t forget about library‑linked streaming options like Kanopy or Hoopla (if your library or university is registered), and official uploads by film distributors on YouTube—these can also give you legal access to classic movies.