Orcs sent by Saruman and Sauron kill Boromir and kidnap Merry and Pippin. After agonizing over which pair of hobbits to follow, Aragorn, Gimli and Legolas pursue the orcs bearing Merry and Pippin to Saruman. In the kingdom of Rohan, the orcs are slain by a company of the Rohirrim. Merry and Pippin escape into Fangorn Forest, where they are befriended by Treebeard, the oldest of the tree-like Ents. Aragorn, Gimli and Legolas track the hobbits to Fangorn, and encounter Gandalf, resurrected as the significantly more powerful "Gandalf the White" after his mutually fatal duel with the Balrog. Gandalf assures them that Merry and Pippin are safe. They then ride to Edoras, the capital of Rohan, where they free Théoden, King of Rohan, from the influence of Saruman's henchman Gríma Wormtongue. Théoden musters his fighting strength and rides to the ancient fortress of Helm's Deep, but en route Gandalf leaves to seek help from Treebeard. Meanwhile, the Ents, roused from their customarily peaceful ways by Merry and Pippin, attack Isengard, Saruman's stronghold,
peaceful ways by Merry and Pippin, attack Isengard, Saruman's stronghold, and trap the wizard in the tower of Orthanc. Gandalf convinces Treebeard to send an army of Huorns to Théoden's aid. Gandalf and Rohirrim reinforcements arrive at Helm's Deep just in time to defeat and scatter Saruman's army. The Huorns dispose of the fleeing orcs. Gandalf then parleys with Saruman at Orthanc. When Saruman rejects his offer of redemption, Gandalf strips him of his rank and most of his powers. Pippin looks into a palantír, a seeing-stone that Saruman had used to communicate with Sauron and through which he was enslaved. Gandalf rides for Minas Tirith, chief city of Gondor, taking Pippin with him.