In this sixth set of episodes culled from the popular Discovery Channel series, special-effects wizards Adam Savage and Jamie Hyneman bust myths -- and shatter preconceived notions about urban legends and scientific processes. But, of course, they can't go it alone. Helping them test out their hypotheses in a variety of explosive situations are builder Tory Belleci, artist Kari Byron and robotics whiz Grant Imahara.