The Grand Tour Season 3, Episode 13, "Survival of the Fattest," follows the hosts as they assemble a vehicle from flat-packed parts to traverse 500 miles of Mongolian wilderness, earning praise as the show's best special. Featuring the bespoke "John" car, the episode highlights the team's reliance on a single, highly capable off-roader to reach their destination without the usual scripted gags. For a detailed breakdown of the episode, visit Top Gear Wiki .