Due to his well-known reputation as a dangerous killer, Autolycus posed as him in order to sneak into the castle of Malthus, who had a deal with Autolycus that the two wouldn't ever steal from each other. Malthus, a wealthy thief, had managed to steal "the most powerful weapon in the world," which belonged to some old friends of Xena's. However, their cover was blown when the real Sinteres showed up and fought with Xena (after using pressure points to explode the brain of a traitor). Xena did eventually kill him using pressure points.
He was played by Grant Bridger.