The Lost Symbol, is an American action-adventure mystery-thriller television series based on Dan Brown's 2009 novel, The Lost Symbol. The series is a prequel to the Robert Langdon film series, and features Ashley Zukerman as fictional Harvard symbologist Robert Langdon.

With the CIA hot on their trail and Mal'akh demanding they split up, Katherine and Langdon turn to Nuñez for help. Sato interrogates Bellamy and takes on pressure from her superiors to produce answers for the growing number of questions regarding this case.