Shark Week

Shark expert, Greg Skomal and a team of engineers from the Woods Hole Oceanographic Institution embark on a mission to find out why Great White sightings in Florida are on the rise. It's the biggest study ever of Atlantic great whites.

The quest to photograph the largest great white shark continues as experts Andy Casagrande and Jeff Kurr join forces with Dickie Chivell at Guadalupe Island, Mexico. Theories suggest these mega sharks may come to feed and mate at this great white hot spot.

A team of marine biologists set out to clock the top speed of the fastest shark in the ocean - the mako. Meanwhile, a second crew aims to prove that makos are ambush predators that will breach to kill their prey, just like the great whites.

Since 2008, every two years, in October, shark attacks strike Surf Beach, California. Now as October 2014 closes in, questions remain: will the attacks happen again? Is it the same shark? And, can DNA identify the great white shark responsible?

Deep below the oceans's surface live some of the strangest marine animals on the earth. Now, three expeditions are exploring those depths for sharks that glow in the dark. They are hoping for a close encounter in the strange domain of alien sharks.

At nearly 18 feet and over 3,000 pounds, a record-breaking female great white shark nicknamed "Joan of Shark" roams the waters off Western Australia. Three shark experts follow an extraordinary 4,000-mile migratory path to find and tag her.