Shark Week, 2007

It's not summer without Shark Week, and in 2007, the ultimate must-watch summertime television event turned 20 — making it cable's longest-running event. Shark Week's 20th Anniversary features shark programs devoted to the behavior of one of the most mysterious and majestic creatures on the planet. For the past two decades, Shark Week has intrigued, educated, and enthralled viewers. And every year since its inception, Shark Week has partnered with the world's most renowned shark scientists and experienced underwater cinematographers to bring viewers the latest information about the ocean's top predator.