How real is NBC’s Running Wild with Bear Grylls?

I've loved the Running Wild episodes that I've watched previously—Nick Jonas swam through icy water despite his diabetes and struggles to get circulation in his feet, and Julianne Hough encountered elephants, cheetahs and a snake. How safe are the contestants? Do they know what their up for before showing up to film? And is their journey as spontaneous as it seems on TV? And are they alone or is a crew with them? Tell me more! —Bradley... keep reading this story »

from reality blurred https://www.realityblurred.com/realitytv/2018/05/running-wild-with-bear-grylls-nbc-production/