Capturing Kerberos alive, without using weapons, was the final labour assigned to Heracles (Hercules) by King Eurystheus, in recompense for the killing of his own children by Megara after he was driven insane by Hera, and therefore was the most dangerous and difficult. In the traditional version, Herakles would not have been required to capture Cerberus, however Eurystheus discounted the completion of two of the tasks as Heracles had received assistance.