The Worst Episodes of Dan Brown's The Lost Symbol

As Mal'akh's plan culminates, Peter and Langdon wrestle over the sacrifice needed to save Katherine.

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Robert and Katherine get help from an old friend while trying to decipher the most recent clue.

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Langdon must reunite with Katherine and team up with Sato while Nuñez follows a hunch.

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With the CIA on their trail, Robert and Katherine turn to Nuñez for help; Sato interrogates Bellamy.

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Forced to split up, Langdon follows the next clue while Katherine joins Sato to find her father.

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Mal'akh sheds light on Zach's final days in prison. Langdon and Katherine face their shared past.

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Katherine and Langdon persuade Isabel to protect herself. Peter reconnects with Leviathan members.

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Writer: Andrew Saito

Langdon, Katherine, Nuñez and Peter partner with Sato and the CIA to spring a trap for Mal'akh.

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Mal'akh pressures Langdon and Peter to decipher the clues. Katherine, Nuñez and Sato try to regroup.

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Young professor Robert Langdon is pulled into a complex mystery when his mentor is kidnapped.

Director: Dan Trachtenberg

Writer: Dan Dworkin, Jay Beattie