S6 Ep369: Episode 369: The Blackwater Isolation Experiment

In 1988, deep beneath the remote Scottish Highlands, a secret government experiment took place in an abandoned military base. What started as a routine study quickly descended into chaos as the team encountered something far beyond their control. Decades later, investigators are sent to uncover what really happened in those dark, forgotten tunnels… but they soon realize they aren't alone. The whispers still echo through the halls, and something ancient is waiting beneath the earth. What dark secrets were buried, and will anyone survive long enough to uncover the truth?