Mark Ruffalo plays Bruce Banner, aka The Incredible Hulk, in Marvel's The Avengers
. When provoked, Bruce turns into an unstoppable green-skinned monster. Banner's scientific genius is an asset to the Avengers, but "the other guy," as he calls greener self, could be a fatal detriment. Unless Bruce can learn to control himself as the Hulk, he could prove the Avengers' undoing.