Bear Grylls and Zac Efron Bear Grylls and Zac Efron

What's better than watching Zac Efron rappel down a cliff? Watching him rappel shirtless!

Each week on NBC's new series Running Wild with Bear Grylls, the survivalist takes one celebrity into the most remote locations in the U.S. and around the world for a 48-hour journey of a lifetime. From skydiving into the Catskill Mountains, to rappelling down the cliffs of Utah and battling torrential wind and rain in Scotland, Grylls and each celebrity will have to push both their minds and bodies to the limit to successfully complete their journey.

Find out more about the new series and why it's our pick for Monday's Watch This Tonight:

Running Wild with Bear Grylls airs on Mondays at 8/7c on NBC.