By this point Théoden had grown weak with age, and was largely controlled by his chief advisor Gríma Wormtongue, who was secretly in the employ of the corrupt wizard Saruman.
Tall and proud he seemed again; and rising in his stirrups he cried in a loud voice, more clear than any there had ever heard a mortal man achieve before: 'Arise, arise, Riders of Théoden!
When Gandalf and Aragorn, along with Legolas and Gimli, appeared before him in The Two Towers, Théoden initially rebuffed the wizard's advice to oppose Saruman.
[5] According to the scholar Elizabeth Solopova, the character of Théoden was inspired by the concept of Northern courage in Norse mythology, particularly in the Beowulf epos: the protagonist of a story shows perseverance while knowing that he is going to be defeated and killed.
[T 7] Among them, Steve Walker calls it "almost epic in its amplitude", inviting the reader's imagination by alluding "to unseen complexity", a whole mythology of Middle-earth under the visible text.
[10][a] Peter Kreeft writes that "it is hard not to feel your heart leap with joy at Théoden's transformation into a warrior", however difficult people find the old Roman view that it is sweet to die for your country, dulce et decorum est pro patria mori.
[11] The Tolkien scholar Tom Shippey writes that Rohan is directly calqued on Anglo-Saxon England, taking many features from Beowulf, and not only in personal names, place-names, and language.
[12][13] Tolkien scholars including Jane Chance contrast Théoden with another "Germanic king", Denethor, the last of the Ruling Stewards of Gondor.
[2] Shippey makes the same comparison, extending it to numerous elements of the two Men's stories, writing that Théoden lives by a theory of Northern courage, and dies through Denethor's despair.
[15][16] In the 1981 BBC Radio 4 version of The Lord of the Rings, Théoden's death is described in song rather than dramatized conventionally; he is voiced by Jack May.
[18] Théoden also appears in Rankin/Bass's attempt to complete the story left unfinished by Bakshi in their television adaptation of The Return of the King, though he speaks little, and is voiced by Don Messick.
Gandalf (Ian McKellen) releases him from the spell, instantly restoring him to his true age, after which Théoden banishes Gríma Wormtongue (Brad Dourif) from Edoras.