Dan Brown’s The Lost Symbol 1x6 Diophantine Pseudonym Season 1 Season 1 10 Episodes 1x1 - As Above, So Below 1x2 - The Araf 1x3 - Murmuration 1x4 - L'Enfant Orientation 1x5 - Melencolia I 1x6 - Diophantine Pseudonym 1x7 - Noögenesis 1x8 - Cascade 1x9 - Order Eight 1x10 - Resonance Mal'akh pressures Langdon and Peter to decipher the clues. Katherine, Nuñez and Sato try to regroup.