Shark Week - Season 21 / Year 2017

Every two years off the coast of California, a scene of great white attacks occur. Could it be the same shark again and again? Dr. Michael Domeier returns to Shark Week with experts Ralph Collier and Cal Lutheran to find the answer once and for all.

Sharks, the world's fastest and most efficient predators. Michael Phelps, our greatest champion to ever get in the water. A Shark Week first brings an event so monumental, no one has ever attempted it before. Phelps vs Shark - the race is on!

Shark Week's Paul de Gelder teams up with Dr. Mark Meekan to travel to the sharkiest places in the world, Cobourg Penninsula in Northern Australia. They want to know what happens when 14-foot crocodiles moves into shark infested waters?

Early November, pregnant giant hammerheads arrive off Bimini, in the Bahamas and Shark Week's Dr. Tristan Guttridge wants to know why? And he and his team even perform the world's first ever ultrasound on hammerheads to find the answers.

Greg Skomal & Joe Remeiro return to Shark Week to study the area that brings thirty species of sharks, the Gulf Stream. They will focus on three sharks that can out-swim, out-think, and out-compete all the others makos, great whites, and porbeagles.

Paul De Gelder returns to Shark Week with Dr. Jonathan Werry and Andy Casagrande to unlock the mysteries of the new great white hotspot, Isle of Jaws. And on their journey, they make a startling discovery that causes them to re-think everything.

Alien Sharks is back on Shark Week to find the strangest shark in the waters. Dr. Craig O'Connoll travels to the Bass Strait for sawsharks, while Victoria Elena Vasquez and Dr. David Ebert go into deep water in Tokyo Bay to find the goblin shark.

Along the coastline of LA, great white sharks are increasing and they seem to be hunting out of season. Dr. Chris Lowe returns to Shark Week to find out why. His investigation takes him to Guadalupe Island, off Mexico, where he finds the answer.

For decades, great white numbers were declining in the waters around New York but now the seals are back! Are the great whites far behind? Shark Week's Dr. Craig O'Connell tries to find the answers and shows the future with great whites in New York.

Shark Week sends underwater cameraman Devin Massyn with a team of explorers to float in a one-of-a-kind shark cage, 500 miles into the Gulf of Mexico. Acting as human lures in the open ocean will they encounter its deadliest predator?

Across the world, sharks congregate and concentrate around volcanoes and volcanic islands. This year on Shark Week, Dr. Mike Heithaus dives several volcanoes to find out why they are shark hotspots?

Dr. Hazin appears on Shark Week for the 1st-time by traveling to Brazil to reduce the number of shark attacks by simply catching & moving sharks to the open sea. What's his secret? Can this solution work in Australia, where attacks are a problem?

Ornella Weideli returns to Shark Week with Dr. Tristan Guttridge to find out why sharks come together at various times of the year and in different locations around the world to socialize, hunt, swarm, and spiral.

Shark Week goes to Madagascar, a place NOT known for great white sharks. So why has a great white from South Africa made the 1500-mile trip? Craig O'Connell and the team make the trip to find out why and if this is the next great water hotspot.

Luke Tipple returns to Shark Week with his team to unravel the mystery behind one of the strangest creatures, the sawfish. They set out on the most dangerous dive to help bring this rare creature back from the brink of extinction.

A review of the greatest moments from Shark Week 2017, including the close calls, big bites, great gadgets, and viewers' top picks.

Multi-time Olympic gold medalist Michael Phelps meets Doc Gruber and Tristan Gutteridge from the Bimini shark lab to learn everything there is to know about sharks.