You're gonna need a bigger home video library! In this week-long celebration (if that is the right word) of one of nature's most fearsome creatures, a wealth of useful information about sharks is dispensed in a series of Discovery Channel episodes from "Mythbusters," "Survivorman," and other programs, exploring why sharks sometimes attack people, how to avoid being attacked by a shark, and much more. 5 3/4 hrs. total on two discs. Widescreen (Enhanced); Soundtrack: English Dolby Digital 5.1; bonus episodes "Shark Attack Files IV," "Dirty Jobs: Jobs That Bite," and "Dirty Jobs: Jobs That Bite Harder."