Catch the premiere of SHARK WEEK 2012 Sunday, August 12, 2012 at 9PM e/p on Discovery. | dsc.discovery.com | Colossus, Seal Island's largest great white, destroys a robotic seal decoy equipped with video cameras. Watch Robo-Seal's last agonizing moments. "Air Jaws Apocalypse" is part of the Shark Week 2012 lineup. Visit sharkweek.com for air dates.