Hometree destroyed. Despite Grace's argument that destroying Hometree could damage Pandora's biological neural network, Selfridge gives Jake and Grace one hour to convince the Na'vi to evacuate. Jake confesses that he was a spy and the Na'vi take him and Grace captive. Quaritch's soldiers destroy Hometree, killing many, including Neytiri's father, the clan chief. Mo'at frees Jake and Grace, but they are detached from their avatars and imprisoned by Quaritch's forces. Pilot Trudy Chacón, disgusted by Quaritch's brutality, airlifts Jake, Grace, and Norm to Grace's outpost. Grace is shot during the escape. Jake regains the Na'vi's trust by connecting his mind to that of Toruk, a dragon-like creature feared and revered by the Na'vi. At the sacred Tree of Souls, Jake pleads with Mo'at to heal Grace. The clan attempts to transfer Grace into her avatar with the aid of the Tree of Souls, but she dies. Supported by new chief Tsu'tey, Jake unites the clan, telling them to gather all the clans to battle the RDA. Quaritch organizes a strike against the Tree of Souls to demoralize the Na'vi. Jake prays to the Na'vi deity Eywa via a neural connection with the Tree of Souls. Tsu'tey and Trudy are among the battle's heavy casualties. The Na'vi are rescued when Pandoran wildlife unexpectedly join the attack and overwhelm the humans, which Neytiri interprets as Eywa answering Jake's prayer. Quaritch, wearing an AMP suit, escapes his crashed aircraft and breaks open the avatar link unit containing Jake's human body, exposing it to Pandora's poisonous atmosphere. As Quaritch prepares to slit Jake's avatar's throat, he is killed by Neytiri, who saves Jake from suffocation, seeing his human form for the first time. With the exceptions of Jake, Norm, and a select few others, all humans are expelled from Pandora. Jake is permanently transferred into his avatar with the aid of the Tree of Souls. Cast Sam Worthington as Corporal Jake Sully, a disabled former Marine who becomes part of the Avatar Program after his twin brother is killed. His military background helps the Na'vi warriors relate to him. Cameron cast the Australian actor after a worldwide search for promising young actors, preferring relative unknowns to keep the budget down. Worthington, who was living in his car at the time, auditioned twice early in development, and he has signed on for possible sequels. Cameron felt that because Worthington had not done a major