Dan Brown's The Lost Symbol, Diophantine Pseudonym
Season 1, Episode 6
Watch Full Episodes of Dan Brown's The Lost Symbol Season 1
Young professor Robert Langdon is pulled into a complex mystery when his mentor is kidnapped.
The ArafRobert and Katherine get help from an old friend while trying to decipher the most recent clue.
MurmurationWith the CIA on their trail, Robert and Katherine turn to Nuñez for help; Sato interrogates Bellamy.
L’Enfant OrientationForced to split up, Langdon follows the next clue while Katherine joins Sato to find her father.
Melencolia ILangdon must reunite with Katherine and team up with Sato; Nuñez follows a hunch.
Diophantine PseudonymMal’akh pressures Langdon and Peter to decipher the clues; Katherine, Nuñez and Sato try to regroup.
NoögenesisMal'akh sheds light on Zach's final days in prison; Langdon and Katherine face their shared past.
CascadeKatherine and Langdon persuade Isabel to protect herself; Peter reconnects with Leviathan members.
Order EightLangdon, Katherine, Nuñez and Peter partner with Sato and the CIA to spring a trap for Mal’akh.
ResonanceAs Mal’akh’s plan culminates, Peter and Langdon wrestle over the sacrifice needed to save Katherine.
Show More- About this Episode
- Mal’akh pressures Langdon and Peter to decipher the clues; Katherine, Nuñez and Sato try to regroup.
- CastAshley Zukerman, Suzy Eddie Izzard, Valorie Curry
- GenreThriller, Drama, Mystery
- Seasons1
- StudioNBC Peacock
You May Also Like
Pick a Plan. Cancel Anytime.
Premium
Watch TV, movies, sports & more, with ads.
TV Favorites from NBC, Bravo, & More
LIVE Sports & Events
Hit Films & Peacock Originals
If you have an annual plan, this subscription will start after your current plan ends.MONTHLY
ANNUAL
Get 12 Months for the Price of 10
Premium Plus
Watch TV, movies, sports & more, with no ads (limited exclusions)*
TV Favorites from NBC, Bravo, & More
LIVE Sports & Events
Hit Films & Peacock Originals
Downloads & No Ads (limited exclusions)*
If you have an annual plan, this subscription will start after your current plan ends.MONTHLY
ANNUAL
Get 12 Months for the Price of 10
*Certain pages are sponsored, and some programming will still contain ads (channels, live sports and events, and a few shows and movies). Some titles available to watch offline.
New & Coming Soon on Peacock
The Traitors
Emmy® Award-winning series The Traitors is a nail-biting psychological adventure in which treachery and deceit are the name of the game.
Wicked: For Good
In the epic conclusion to the story of the witches of Oz, Elphaba and Glinda must reunite if they are to change themselves—and all of Oz—for good.
The 'Burbs
When a mysterious man moves in across the street, a young couple and their quirky neighbors uncover dark secrets about their quiet suburban town.
The Fall and Rise of Reggie Dinkins
From the team behind 30 Rock comes an all-new comedy about a disgraced ex-football star and washed-up filmmaker trying to make their epic comeback.
Stream new movies, hit shows, exclusive Originals, live sports, WWE, news, and more.



