The third and final film in Peter Jackson's Lord of the Rings trilogy, The Return of the King opens to find Middle-earth on the cusp of great change. Weary hobbits Frodo (Elijah Wood) and Sam (Sean Astin) venture further into the dark realm of Mordor, guided by the increasingly desperate Gollum (Andy Serkis), the two-faced former owner of the Ring that Frodo must destroy in the fires of Mount Doom.