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.