Keyword Shark Week

In the Caribbean, a deep-sea camera captured footage of a 14-foot tiger shark suffering an assault by a large, unseen beast. It could be an unknown species of mega-shark or even a cannibalistic tiger shark. Dr. Austin Gallagher wants to find out.

A Mexican fishing village faces fatal shark attacks on mollusk divers. Investigators arrive, capturing footage of a massive great white offshore. They discover the sharks may be using the village's waters as a nursery ground.