The Ultimate Fighting Championship returns with one of the organization's greatest events ever, as middleweight titleholder Anderson Silva faces the top ground fighter in the division, Jiu-Jitsu wizard Demian Maia. Plus, lightweight champion BJ Penn looks to continue his dominant reign when he takes on Frankie Edgar in the double main event of UFC 112. Also, two legends meet for the first time when future UFC Hall of Famer Matt Hughes battles Brazilian superstar Renzo Gracie.