A Summary Thing

Hercules went into the swamp and met his old friend Iolaus and stayed at his house for a little while before killing the Hydra. In his first attempt to kill the Hydra, Hercules cut the heads off, only to see two new ones grow back. So he went back to Iolaus's house and persuaded him to come with him to the Hydra armed with a torch. When Hercules went back to the Hydra with Iolaus, he cut off the heads and made Iolaus put the torch on the stub that was left. When he put the torch on the stubs, it sealed them shut, so heads could not regrow. He and Iolaus repeated this process until all the heads on the Hydra were gone, and weren't growing back.