When invaders thrive, ecosystems become battlegrounds for survival.
Explore how relentless species spread through oceans and forests, from king crabs reshaping the Atlantic seabed to pine processionary caterpillars stripping European pines. As scientists track their astonishing resilience, destructive appetites, and shifting range, each episode reveals how quickly natural balance can change, making this series a smart reason to sign up and keep watching.
Episode guide
2 episodes- New shows weeklyFresh documentaries land every week.
- Exclusive originalsAward-winning films you can’t stream anywhere else.
- Watch anywherePhone, tablet, web and TV — pick up where you left off.
- No commitmentNo contract. Cancel in a click.
Frequently asked questions
Yes. Every plan unlocks the full library — including all Curiosity Originals like Alien Takeover — in up to 4K, ad-free, on all your devices.
Alien Takeover is a Curiosity Original, exclusive to Curiosity Stream.
Watch on the web, iOS and Android, Roku, Apple TV, Amazon Fire TV, Chromecast, Android TV, and most smart TVs. Start on one device and pick up right where you left off on another.
Curiosity Stream is our streaming service — thousands of documentaries and originals. The Smart Bundle is Curiosity Stream plus four other independent streaming services (Tastemade, Kidstream, Curiosity University, and SOMM TV) on a single subscription.