When Dr. Martin Harris awakes in a hospital in Berlin after an almost fatal car crash which put him in a coma for four days; he finds himself alone, his wife was also in the car with him but she's nowhere to be found. Worried for her safety Harris sets out to find her but when he eventually does, she does not recognise him and a stranger has assumed his identity.
Alone in an unfamiliar city, Harris' only hope is to prove his identity but many obstacles face him as the police don't believe his story and the doctors are beginning to think he's going crazy. The only one person who can confirm his identity is the driver of the cab who - after finding agrees to help. As Harris digs deeper for the truth behind what's really happened he must question his sanity and reveal just how much he's willing to loose in an effort to get his life back.
Unknown is released in UK cinemas on 25th February 2011.
Directed by: Jaume Collet-Serra
Starring: Liam Neeson, January Jones, Diane Kruger, Aidan Quinn, Frank Langella, Bruno Ganz, Sebastian Koch, Stipe Erceg, Mido Hamada and Karl Markovics