TNT's 'Legends' Debuts Dramatic New Trailer (Exclusive Video)

TNT's Legends has a new trailer.

Based on the book by author Robert Littell, Legends centers on undercover agent Martin Odum (Sean Bean), who works for the FBI's Deep Cover Operations (DCO) division. Martin can transform himself into a completely different person for each job, but he begins to question his own identity when a mysterious stranger suggests Martin isn't the man he believes himself to be.

PHOTOS Summer TV Preview: 33 New Series on Cable and Broadcast

The Hollywood Reporter exclusively debuts dramatic new footage from the hourlong series, which launches Aug. 13 at 9 p.m. ET, featuring Martin as he begins to uncover the harsh truth behind his actual identity. "I live the life of shadows," Martin says. "But I am the one in the dark."

Highly stylized and meant to give off a feeling of uncertainty and confusion, the teaser — complete with ominous voiceovers — introduces doubt into the equation, spliced together with vignettes of Martin's lie of a life.

PHOTOS Broadcast TV's New Shows for 2014-15 Season

Ali Larter, Morris Chestnut, Tina Majorino, Steve Harris, Amber Valletta and Mason Cook also star in the 13-episode series.

Produced by Fox 21, the series is executive produced by Howard Gordon, Alexander Cary, Jonathan Levin, Brad Turner and showrunner David Wilcox. Jeffrey Nachmanoff wrote the pilot and developed it with Gordon and Mark Bomback, with David Semel directing.

Twitter: @insidethetube