The Labours of Hercules or Labours of Heracles (Ancient Greek: ἆθλοι, âthloi, Latin: Labores) are a series of tasks carried out by Heracles, the greatest of the Greek heroes, whose name was later romanised as Hercules. They were accomplished in the service of King Eurystheus. The episodes were later connected by a continuous narrative.
The establishment of a fixed cycle of twelve labours was attributed by the Greeks to an epic poem, now lost, written by Peisander (7th to 6th centuries BC).
In Greek mythology, Cerberus (/ˈsɜːrbərəs/ or /ˈkɜːrbərəs/; Ancient Greek: Κέρβερος Kérberos [ˈkerberos]), often referred to as the hound of Hades, is a multi-headed dog that guards the gates of the underworld to prevent the dead from leaving. He was the offspring of the monsters Echidna and Typhon, and was usually described as having three heads, a serpent for a tail, and snakes protruding from his body. Cerberus is primarily known for his capture by Heracles, the last of Heracles' twelve labours.