The Lost Symbol

Langdon is called to Washington for a talk, supposedly by Peter Solomon, a 33rd-degree Mason. At the Capitol, he finds Peter's severed hand. The kidnapper, Mal'akh, wants Langdon to find the Masonic Pyramid and the Lost Word. With Inoue Sato's CIA on his tail, Langdon flees with the Architect of the Capitol and later with Katherine Solomon, Peter's sister and a noetic scientist. Mal'akh nearly drowns Langdon in a tank. At the House of the Temple, he reveals he's Zachary, Peter's son, and asks his father to sacrifice him. The CIA helicopter smashes the skylight and the glass kills him. The Lost Word turns out to be a Bible buried in the Washington Monument.

1. ChangeA young Langdon with a past

   In the book, Langdon is the professor readers know from Angels & Demons and The Da Vinci Code. The series rolls him back about 20 years and makes Katherine Solomon his ex.

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2. ChangePeter becomes Katherine's father

   In the book, Peter Solomon is Katherine's brother. In the series, Eddie Izzard plays a Peter who is her father, so Mal'akh becomes Katherine's brother instead of her nephew.

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3. ChangeA new sonic weapon

   The series invents Cascade, a sonic device Mal'akh tests on a lake, plus a final plan built around a resonance device beneath the Washington Monument. In the book, the final threat is a video of Masonic rituals.

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4. ChangeA different end for Mal'akh

   In the book, the CIA helicopter smashes the House of the Temple skylight and the falling glass kills Mal'akh. In the series, Nuñez disables the device and Katherine stabs the villain.

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