Unknown (2011)

This is an okay movie. While visiting Berlin for a biotechnology conference, Dr. Martin Harris (Liam Neeson) is in an automobile accident. Four days later he awakens in a German hospital, confused about his situation and lacking any form of identification. He is released and locates his wife at a hotel, but she does not seem to recognize him. He becomes irate and is hassled by hotel security. Suspecting a plot to discredit his identity, he hires a local detective to discover who he really is.

The film is based on the 2003 French novel Hors de moi written by Didier van Cauwelaert, and published in English as Out of My Head. Many German actors were cast for the movie.