Iceland

S1 : E1 | TV-PG | 43 min | Aired: 07.18.23

The Land of Fire and Ice harnesses the Earth’s power into clean, renewable energy for the entire country - and local industries prove that a society without waste is within grasp.

France

S1 : E2 | TV-PG | 40 min | Aired: 07.25.23

The City of Lights sparkles even brighter as Zac and Darin take in Earth’s most important resource: water.

Sardinia

S1 : E4 | TV-PG | 38 min | Aired: 08.09.23

This small Italian island has a history of more people living into their hundreds than most other spots in the world. Is the secret to longevity their food, wine, family or faith – or is it a mix of all?

Lima

S1 : E5 | TV-14 | 44 min | Aired: 08.16.23

Zac and Darin head to Peru to delve into potato cryopreservation, biopiracy and the sport of sandboarding.

Puerto Rico

S1 : E6 | TV-14 | 43 min | Aired: 08.16.23

In the wake of Hurricane Maria, Zac explores sustainability in Puerto Rico where he meets chef José Andrés, milks a goat and eats ceviche.

London

S1 : E7 | TV-14 | 38 min | Aired: 08.16.23

Stream Down to Earth With Zac Efron free on The CW!

Iquitos

S1 : E8 | TV-14 | 43 min | Aired: 08.16.23

In the Amazon rainforest, Zac boosts his immune system, climbs a tree, explores ayahuasca tourism, and watches his dinner wriggle on a plate.