Z Nation (2014)

S2E35 When Tolls the Bell of Night

Yin Doo persuades Windfang to help him release an ancient demon of fear and darkness, locked away for centuries. However, once freed, the creature proves far stronger than expected, threatening to consume everything in its path. Faced with total destruction, former enemies may be forced to join forces in a desperate bid to defeat the beast before it plunges the world into eternal shadow.