Shark Week

Season 27, Episode 5

Episode Title: Alien Sharks: Return to the Abyss

Air Date: 2014-08-12

Overview:

In Alien Sharks: Return to the Abyss, shark researcher Paul Clerkin heads to the Indian Ocean to investigate the ocean’s darkest depths in search of shark species that scientists never even knew existed and get a glimpse of the last known group of bioluminescent sharks in the world.