When a massive sinkhole mysteriously opens in Los Angeles, it tears a family in half, separating mother and son from father and daughter. When part of the family finds themselves in an unexplainable primeval world, alongside a disparate group of strangers, they must work to survive and uncover the mystery of where they are and if there is a way back home.
- Genre: Action & Adventure, Drama, Sci-Fi & Fantasy
- Status: Ongoing
- Stars: Chiké Okonkwo, Eoin Macken, Jack Martin, Jon Seda, Karina Logue, Natalie Zea, Nicholas Gonzalez, Rohan Mirchandaney, Veronica St. Clair, Zyra Gorecki
- Duration: min
- Country: US
- Network: NBC