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Andy, an idealist medical student with a serious Elvis obsession, works to perfect his rat-to-rat brain transfer to "help mankind and change the face of modern science". After his final experiment fails and blows up, Andy loses his chance to travel abroad and study at the prestigious Reinhardt Institute. With his future in doubt, and with no place to live, his future looks bleak. Little does Andy know that his beloved professor and mentor, Doc Crosby, is actually a mad scientist who has been murdering people and stealing their brains for experiments in his makeshift "black and white" laboratory. When Doc realizes that his own brains so severely damaged from experimenting on himself, and that he will be dead in a matter of hours without a successful brain transfer, he hatches a scheme to acquire the thirteen human brains needed for his "brain pyramid". Knowing that Andy is homeless and that college kids can't resist having big parties, Doc invites Andy to house-sit while he goes away ...

How to Watch Housesitter: The Night They Saved Siegfried's Brain Legally and Safely

If you want to stream Housesitter: The Night They Saved Siegfried's Brain 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 Housesitter: The Night They Saved Siegfried's Brain 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.