The Bering Sea, the Gulf of Alaska, and the North Atlantic are among the deadliest waterways across the world. DEADLY SEAS, a new three-part series that explores these lethal waters, begins on Discovery Channel on Friday, June 8 at 9 PM ET/PT. DEADLY SEAS explores violent and baleful bodies of water, and shares the stories of those who courageously face these wicked watery leviathans over and over again.