Dan Brown's The Lost Symbol, or simply 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. It also stars Eddie Izzard, Beau Knapp, Rick Gonzalez, Valorie Curry and Sumalee Montano in main roles. Dan Trachtenberg directed the series pilot and serves as executive producer on the series alongside Ron Howard, Brian Grazer and Brown himself. The series consists of ten episodes, premiered on September 16, 2021, on Peacock. In January 2022, the series was cancelled after one season.