Lost on Everest shines a light on what happened to Andrew "Sandy" Irvine and George Leigh Mallory, who set out to attempt the first true summit of Mount Everest in 1924. A team of professional climbers, filmmakers and experts led by journalist Mark Synnott and Nat Geo photographer Renan Ozturk attempts to discover whether Irvine and Mallory successfully conquered the world's tallest mountain.

Originally released by National Geographic, 2020. Streaming video file encoded with permission for digital streaming by Infobase on January 05, 2023.