Track Earth's mightiest animals, and the ancient giants that shaped them.

Follow zoologist and conservationist Dan O'Neill across five globe-spanning episodes as he searches for giant animals living today. Using the latest scientific data, the series connects them to even larger extinct ancestors, revealing how they evolved, why those ancient giants died out, and what it will take to protect their modern counterparts.

Episode guide

5 episodes

1Anacondas

Dan O’Neill is on a mission to find and film the planet's biggest living Anacondas. Dan joins Dr. Juliana Terra, a herpetologist in Southern Brazil, hoping to track down a giant female Green Anaconda during the mating season. But it won’t be easy when camouflage is one of their greatest skills.

52 min

2Elephants

Dan O’Neill is on a mission to find, film, and measure the biggest living elephants. Using CGI he will learn about their ancestors, explore their evolutionary secrets, and learn what we can do to protect the giant Elephants of today. Dan is hoping to track down the incredibly rare super tuskers.

52 min

3Crocodiles

Dan O’Neill is on a mission to find, film, and measure the biggest living crocodiles. Dan joins Dennis, an indigenous saltwater crocodile guide in Australia’s Northern Territory, hoping to track down a legendary giant male lurking somewhere along the Mary River.

52 min

4Sharks

Dan O’Neill is on a mission to find, film, and measure the planet's biggest living shark species. Dan joins marine scientists Charlie and Lauren on their expedition as they set off to the Neptune Islands in South Australia, hoping to find a giant great white lurking somewhere beneath the waves.

52 min

5Lions

Dan O’Neill is on a mission to find and film Earth’s biggest wild lions. Bringing a prehistoric giant back to life with CGI, he’ll learn about the biggest cat to ever exist, explore a lion’s evolutionary secrets, and find out what we can do to protect the giant lions of today.

52 min

Good to know

Frequently asked questions

Thousands of the world's best documentaries and factual programming — nature, history, science, technology, and biography — including exclusive Curiosity Originals like Giants. Stream it all ad-free, anytime.

Plans are billed annually — every plan streams in 4K. The Smart Bundle adds four partner services. There are no contracts — cancel anytime.

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.

Yes. The library is full of family-friendly nature and science programming, and the Smart Bundle includes Kidstream — carefully chosen, ad-free shows kids will love and parents can trust.

Absolutely. There are no contracts and no cancellation fees — manage or cancel your plan anytime from your account settings.

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.

Yes. Start on any plan and move up to the Smart Bundle whenever you like — the change takes effect right away, and your billing is simply prorated from your account settings.

Got your answer? Pick a plan and start streaming.Start streaming

Available now

Start watching Giants today

Stream thousands of award-winning documentaries. Cancel anytime.

Start streaming