Bear started out with one liter of water in his canteen at the start of the episode, and continually reminds his viewers that you need a liter an hour out there. So 1 liter of water, about 10 microliters of water he slurped off a rock and another 5 microliters from river bottom dirt he used to moisten his lips, and no other water? And he’s walking in the heat of the day up and down dunes, talking to narrate, and Monkey Crawling out of sinky sand? Unless he’s guzzling water with the crew off camera, he’d have not made it for a fraction the length of the episode.