Dan Brown's The Lost Symbol

E1. As Above, So Below

Promising young Harvard professor Robert Langdon finds himself pulled into a complex mystery when his former mentor, Peter Solomon, is kidnapped. Armed with knowledge of history, symbols and dead languages, Langdon must work together with Peter's daughter and other allies to find the Lost Symbol – or lose the man they both see as a father.

★ 6.9

E2. The Araf

Reeling from the day's events, Langdon and Katherine get help and shelter from an old friend while they attempt to decipher the most recent clue. Meanwhile, amidst visions of his past, Peter attempts an escape.

★ 6.3

E3. Murmuration

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.

★ 6.3

E4. L'Enfant Orientation

Forced to split up by Mal'akh, Langdon follows the next clue while Katherine teams up with Sato to find her father another way.

★ 6.5

E5. Melencolia I

When Mal'akh sends a disturbing video of Peter, Langdon has no other choice but to reunite with Katherine and team up with Sato for a bold move. Nuñez follows a hunch.

★ 6.4

E6. Diophantine Pseudonym

Mal'akh pressures Langdon and Peter to decipher the clues; Katherine, Nuñez and Sato try to pick up the pieces after the failed drop.

★ 6.6