S4, E12: David Banner searches for a cure to his own malady by investigating a legend of another Hulk-like metamorphosis of a scientist believed dead for thirty years, in the first of a two-part episode. While researching the other scientist's papers, Banner finds that he had indeed found relief from the condition which sent him into a creature-like state. But, the older creature is still alive and doesn't want the antidote to be rediscovered.