O.S.S. - Watch Legally and Safely
John Martin is part of an American spy team dropped into France during World War II to destroy the French railway system. After successfully blowing up a tunnel he runs back to save Ellen and is told "Never come back for me again." Later he must choose whether or not to obey her wishes.
How to Watch O.S.S. Legally and Safely
If you want to stream O.S.S. 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 O.S.S. 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.