Greek underworld his duty was to bring these souls to the underworld and no one would persuade him to do otherwise. Cerberus (Kerberos), or the "Hell-Hound", is Hades' massive multi-headed (usually three-headed) dog with some descriptions stating that it also has a snake-headed tail and snake heads on its back and as its mane. Born from Echidna and Typhon, Cerberus guards the gate that serves as the entrance of the underworld. Cerberus' duty is to prevent dead people from leaving the underworld. Heracles once borrowed Cerberus as the final part of the Labours of Heracles. Orpheus once soothed it to sleep with
Underworld: Rise of the Lycans Lakeshore planned to release a prequel as the third film following "Underworld"s sequel, "" (2006). Kate Beckinsale, who portrayed Selene in "Underworld", expressed interest in reprising her role for the sequel and the prequel. In December 2005, "Underworld: Evolution" director Len Wiseman explained that the "Underworld" franchise was originally conceived as a trilogy. Wiseman said, "We sort of mapped out an entire history and story... a massive collection of ideas and stories that we're putting out at certain times." Wiseman anticipated creating a third installment for the franchise based on the audience's reception of "Underworld: Evolution", which would be released