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The most intelligent serial murderers can be the most dangerous. Edmund Kemper, Unabomber Ted Kaczynski, and Randy Kraft all showed genius-level IQs, and their extraordinary intellect allowed them to kill for years-sometimes decades-without getting caught. Where do the lines of evil and intelligence intersect? Armed with new scientific discoveries on early brain development, Dr. Stone analyzes Kemper, Kaczynski, and Kraft to find out what made these killers use their cunning for crime.

How to Watch Discovery Channel: Most Evil - Mastermind Legally and Safely

If you want to stream Discovery Channel: Most Evil - Mastermind 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 Discovery Channel: Most Evil - Mastermind 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.