MILES O'BRIEN: The icebreakers have been having a really hard time.

This part of the world still has three wild jaguars.

We are standing in this lush orchard in the middle of the desert.

(voiceover): I'm Miles O'Brien and I'm searching the globe for solutions.

Going deep into the world of beavers here.

(voiceover): Going waist-deep.

Ready to take the heat.

OLLIE JAY: Every heat-related death is preventable.

KRIS TOMPKINS: You can bring a species back, even a top predator.

STEVE PFAUTSCH: Einstein said play is the greatest science there is.

This is how the sausage is made, people.

JENNIFER SMITH: Seaweeds have an order of magnitude more vitamins than any vegetable we can grow on land.

ALI REZAI: A lot of very precious brain territory, so you don't want to impact those areas.

ERIN MCNULTY: My cravings, I don't even think about it.

Those obsessive thoughts are pretty much gone.

O'BRIEN (voiceover): I'm eager to introduce you to the problem solvers I've met... Hey, Kris, good to see you again.

(voiceover): ...and their unlikely allies.

EMILY FAIRFAX: Beavers are out there doing a huge amount of work.

THOMAS CHANT: I rode up this creek and I was, "What are these people doing?"

O'BRIEN: It's hard work... One revolution of one blade powers one house for one day.

Ooh!

Doesn't have any particular smell.

Just good, clean mud.

(on radio): Bravo alpha to runway five for Cessna 8-0-8.

(voiceover): You're all cleared for departure.

(squawks) RESEARCHER: Hopefully we can fly tomorrow evening.

Undeniably, it's melting.

Then the question is, "Why?"

O'BRIEN: Join me... This is, like, a hundred years of thinking about how to poke holes in the ground right here, right?

-Correct.

O'BRIEN: ...on my journey.

Permission to come aboard, sir?

When we are in a state of awe, we are reminded of how small we are in the universe.

O'BRIEN: Let's meet the big, bold thinkers... Great solutions can come from very humble places.

(voiceover): ...on a mission... REZAI: If you have an opportunity to make an impact, why not do it now?

O'BRIEN: ...with a "Resolve to Solve."