1972: 7-year-old Steven Stayner vanishes from Merced, California. For years, his family searches for him, only to find they’ve been looking for the wrong boy. 50 years on, Steven’s children…

A year after a subglacial volcano erupts, mysterious elements from prehistoric times emerge from the melting ice, bringing unforeseen consequences.

When their seemingly fearless leader self-destructs, a team of troubled superheroes must confront festering evil in the world — and in themselves.

Hosted by Akbar Gbajabiamila, 17 competitors that are former “Survivor,” “Alone,” “Naked and Afraid” and “American Ninja Warrior” contestants, set out to survive on a remote island for 25 days…