Unknown stars Liam Neeson as Dr Martin Harris who travels to Berlin with his wife to attend a biotech conference. After arriving, he soon falls into a car accident and when he wakes up, he finds that another person has taken on his identity. Confusingly, his wife does not know him either. This sets an intriguing set of events as Martin tries to find out what has happened, and if he is indeed Martin Harris. Something unusual is happening due to the multiple assassination attempts on him as he scouts around Berlin and old contacts. The pacing of Unknown is solid, there isn't a dull moment and it reveals the solution to the puzzle piece by piece with enough frequency to keep you interested awaiting the full picture at the end. The revelation of who Martin actually is during the climax was slightly disappointing in that it was predictable. Overall, Unknown is a good thriller that manages to keep its mystery under wraps enough for it to feel worthwhile to watch.