TNT announced at the SXSW Film Festival today that Legends, from Homeland executive producers Howard Gordon and Alexander Cary and Fringe co-executive producer David Wilcox, will debut Wednesday, Aug. 20, at 9 PM (ET/PT). The network also released a new trailer for the series, starring Sean Bean (Game of Thrones, The Lord of the Rings) as a deep-undercover FBI agent who may be losing his grip on reality. Check out this new footage, then read on for more details on the upcoming series.

Screen Actors Guild Award winner Sean Bean (Game of Thrones, The Lord of the Rings) stars in Legends, TNT's new, suspense-filled drama based on the award-winning book by master spy novelist Robert Littell. Bean plays Martin Odum, an undercover agent working for the FBI's Deep Cover Operations (DCO) division. Martin has the uncanny ability to transform himself into a completely different person for each job. But he begins to question his own identity when a mysterious stranger suggests that Martin isn't the man he believes himself to be. Legends also stars Ali Larter (Heroes) as Crystal Quest, a fellow operative who has a history with Martin; Morris Chestnut (American Horror Story, Nurse Jackie) as Tony Cimarro, a smart, quick-witted and charming DCO agent; Tina Majorino (Grey's Anatomy, True Blood) as Maggie Harris, the newest member of the DCO team; Steve Harris (The Practice, Awake) as Nelson Gates, the director of the DCO Task Force; and Amber Valletta (Revenge) as Sonya Odum, Martin's ex-wife; and Lux Haney-Jardine (Abraham Lincoln: Vampire Hunter) as Martin's pre-teen son, Aiden. Legends is being produced by Fox 21, with Howard Gordon (Homeland, 24), Alexander Cary (Homeland, Lie to Me) and Jonathan Levin (Charmed) serving as executive producers, along with showrunner David Wilcox (Fringe). The Legends pilot was written by Jeffrey Nachmanoff (Traitor), who developed the story with Mark Gordon (Criminal Minds) and Mark Bomback (Live Free or Die Hard). The pilot was directed by David Semel (American Horror Story).

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