Plague on Hell Island

Plague on Hell Island

Available on Investigation Discovery, Food Network, Science Channel, Discovery, TLC, Travel Channel, HGTV, Prime Video, discovery+, iTunes, Hulu, Animal Planet, WATCH OWN, AHC GO, Destination America GO, Discovery Life GO, Cooking Channel
S8 E4: A strange sea fortress that guards icy waters is home to a grim secret; experts investigate the mysteries at this eerie structure, which fought an invisible enemy far more deadly than ever imagined.