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An earthquake in rural Australia causes a dangerous leak at WALDO, a nuclear waste storage facility. Heinrich Schmidt, an engineer badly hurt in the accident, knows that the leak will poison the groundwater for hundreds of miles around, and wants to warn the public. His boss, however, is only interested in protecting himself, and believes the accident should be covered up, even at the expense of thousands of lives. Heinrich escapes from the facility, but is too badly injured to get very far. Lost in the woods and suffering from amnesia, he is rescued by Larry, an auto mechanic on vacation with his wife, Carmel. As Heinrich tries to piece together his memories of what happened, his boss' thugs are quickly closing in on the trio.

How to Watch The Chain Reaction Legally and Safely

If you want to stream The Chain Reaction 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 The Chain Reaction 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.