River of Fear (S04E09)

Amid the breathtaking beauty of the Grand Canyon, construction contractor David Whittlesey finds the ultimate adventure in the Colorado River. He sets off on a solo, three-week white-water rafting journey, taking on some of the toughest rapids in the country. Just days from finishing his trek, disaster strikes when his raft capsizes, leaving him stranded without any essential supplies. Desperate to escape, he attempts to climb a cliff but suffers an injury in the process. Now isolated and aware that hypothermia could claim his life before anyone realizes he's missing, David faces a dire situation.