<Ul> <Li> Anthony Head as Chiron, the activities director at Camp Half Blood . Chiron is a centaur and the immortal son of Kronos and brother of Zeus, Poseidon, Hades, Demeter, Hestia and Hera . Chiron was previously played by Pierce Brosnan in The Lightning Thief . </Li> <Li> Robert Maillet as Polyphemus, the Cyclops that is guarding the Golden Fleece . <Ul> <Li> Ron Perlman as the voice of Polyphemus </Li> </Ul> </Li> <Li> Shohreh Aghdashloo as the voice of Oracle of Delphi </Li> <Li> Missi Pyle, Yvette Nicole Brown and Mary Birdsong as the Graeae </Li> <Li> Jordan Weller as Ichneutae, the acolyte of Clarisse </Li> <Li> Derek Mears and Aleks Paunovic as Cyclopes . </Li> </Ul> <Li> Anthony Head as Chiron, the activities director at Camp Half Blood . Chiron is a centaur and the immortal son of Kronos and brother of Zeus, Poseidon, Hades, Demeter, Hestia and Hera . Chiron was previously played by Pierce Brosnan in The Lightning Thief . </Li> <Li> Robert Maillet as Polyphemus, the Cyclops that is guarding the Golden Fleece . <Ul> <Li> Ron Perlman as the voice of Polyphemus </Li> </Ul> </Li> <Ul> <Li> Ron Perlman as the voice of Polyphemus </Li> </Ul>

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