Authenticating with

Sign Out

Are you sure you want to Sign Out of your provider account?

Unlock full episodes using your participating TV provider subscription.

ActivateLearn More

You are signed in with your provider account and can watch any available full episodes.

Sign Out from providerLearn More


Next airing Thu Sep 21, 5 p.m. ET

Mega Hammerhead

Dr. Neil Hammerschlag and his team of researchers are setting off on a quest to learn more about this mysterious shark, as well as search for the most elusive of them all -- the massive Great Hammerhead -- a shark that can grow up to 20-ft in length and can weigh over 1,000 pounds.