Unknown is a 2011 action thriller starring Liam Neeson as Martin Harris, a doctor who regains consciousness in Berlin following a car crash and discovers that his wife doesn't seem to know who he is, and another man has taken his identity. Hunted by assassins, Martin slowly uncovers a web of secrets that could hold the key to him regaining his identity. The film is based on Didier van Cauwelaert's novel Out of My Head and the cast includes Diane Kruger and Aidan Quinn. The film would mark the first collaboration between Jaume Collet-Serra and Neeson, who would go on to make three other features: 2015's Run All Night, 2014’s Non-Stop and 2018's The Commuter.
The following weapons were used in the film Unknown (2011):
Smith & Wesson 5906
Smith (Olivier Schneider), the second assassin, uses a very early Smith & Wesson 5906 pistol with pre-Novak sights and a square trigger guard as his sidearm in the film. The gun looks to have been highly polished rather than the matte finish the S&Ws usually have.
Heckler & Koch USP
German police officers seem to have Heckler & Koch USP pistols as their sidearms. Most of them are seen holstered in the film.