Every episode of Shark Week Season 12 ranked from best to worst. Discover the Best Episodes of Shark Week Season 12!

The Discovery Channel's Shark Week, first broadcast on July 17, 1987, is a weeklong series of feature television programs dedicated to sharks. Held annually, normally in July or August, Shark Week was originally developed to raise awareness and respect for sharks. It is the longest-running cable television programming event in history. Now broadcast in over 72 countries, Shark Week is promoted heavily via social networks like Facebook and Twitter.

The Best Episodes of Shark Week Season 12

The Best Episodes of Shark Week Season 12

Seasons38

Season 12 Ratings Summary