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?