What reality show features participants surviving in extreme environments without clothes?

Naked and Afraid features survivalists trying to endure extreme wilderness conditions without clothing. In the original format, two strangers meet in a remote location, remain unclothed, and attempt to complete a 21-day survival challenge.

Each participant may bring one helpful item, such as a machete, hatchet, or fire starter. The pair must find water and food, construct shelter, manage exposure, and reach an extraction point. They may leave early by tapping out, while medical teams can intervene when necessary for safety.

The show premiered on Discovery Channel in 2013 and is narrated by Michael Brown. Its title describes the central premise, but the program is not simply a contest about nudity: the focus is primitive survival skill, cooperation, endurance, and decision-making under severe environmental stress. Naked and Afraid XL expands the idea to larger groups and a 40-day challenge, making it a related spin-off rather than the original series.