"Legends" is about acting. Not the work the actors do in playing their roles in this original show by TNT. The acting that the main character (Martin Odom portrayed by Sean Bean) does in the commission of his job. He works undercover for the FBI's Division of Covert Operations (DCO), a division that specializes in domestic or foreign terrorism. Martin's particular talent is his ability to convincingly assume a false identity (a legend) in undercover work. Viewers who enjoy watching his talent are the main audience for this show.
Martin's personality is suited to this work. When he becomes someone else, he immerses himself totally, to the point that the line between reality and fantasy is blurred. In the first episode, we see him become Lincoln Dittman, a stuttering malcontent who joins a domestic terrorist group because he is disillusioned with the American Dream.
The hazards he faces are physical and psychic. His personal life suffers because of the time demands of the job and because he struggles with reintegrating himself into his real life, where he has a young son, Aiden, and an ex-wife, Sonya (Amber Valletta).
The woman who overseers his operations is Crystal Quest (Ali Larter). She doesn't trust Martin's psychological stability, but her boss Nelson Gates (Steve Harris) values Martin's abilities. Crystal gets drawn into the operations sometimes. She is cool under pressure. Maggie Harris (Tina Majorino) is the computer expert in the office who solves all of the digital problems.
As Martin juggles the dark world of shadow operations and his personal life responsibilities, he follows a longer story arc: who is he? A mysterious man contacted him and alleged that "Martin Odom" is just another legend--just before he was stabbed to death on a subway platform, dying in Martin's arms. Who was the woman that wielded the blade? What can Martin learn from the book that the man gave him with his dying breaths?
It is too early to tell if "Legends" can remain interesting as Martin infiltrates one organization after another. But Sean Bean has a remarkable ability to play the damaged protagonist.
Update 9/4/14: After watching 4 episodes, I am upgrading my rating to 8. This drama is engaging. The acting is good.