
A group of strangers, including a selfless fireman, find themselves trapped i...
The team's tunnel excavation is halted by a mysterious discovery of a gas-filled steel ring, causing their anxiety to resurface. The sudden arrival of a helicopter further complicates their situation, leaving behind an enigmatic box with no apparent purpose.
Current Status: Ended
Network: NBC
Production Country: United States
Additionally, viewers have the option to either rent or purchase "Persons Unknown" on the following digital platforms: AppleTV, Amazon, VUDU, Fandango at Home.