The undercover agent: Selflessly asked to leave their past behind them and go through hell in order to infiltrate the most lonely and dangerous underworlds known to man. They dodge bullets, escape from prisons, kill villains and unhinge plans of unfathomable disaster without ever exposing their true identities.

In 'Traitor' former U.S. Army Special Forces member Samir Horn goes deep undercover for the US government and becomes a part of a terrorist group who plot 50 suicide bomb attacks on Thanksgiving.

The taut new thriller is in cinemas now! But while you have taste for the covert spy, check out the bravado of undercover agents in film as we blow their cover.