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Catherine meets Nick by accident and, after a whirlwind romance, the two get married and Catherine moves into Nick’s apartment only that’s the start of problems when an unseen intruder begins playing strange mind games with Catherine in an apparent attempt to drive her insane. Catherine first suspects Nick is behind it, then suspicion moves to his business partner Badge, then to Nick’s friends, until Catherine suspects that Nick’s first wife Stella, who commited suicide years before, may be behind the occurrences which she may be committing from either beyond the grave, or by a time vortex within the apartment itself which may have let to her suicide in the first place.

How to Watch The Intruder Legally and Safely

If you want to stream The Intruder 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 Intruder 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.