S1, E5: The crew heads to the Polynesian Islands of the South Pacific as they lead an international scientific team to study how coral reefs of the deep function, with the hope of capturing on film the corals spawning.

S1, E5: The crew heads to the Polynesian Islands of the South Pacific as they lead an international scientific team to study how coral reefs of the deep function, with the hope of capturing on film the corals spawning.