The cat-and-mouse game that the filmmakers are playing with us is only partially successful because this thriller is only intermittently thrilling. Instead of being captivated by the twist and turns, we're more likely to be rankled.
Neeson's comforting intelligence (and a marvelous turn by Bruno Ganz as an ailing former member of the East German secret police), are not enough to prevent the film from choking on obviousness and directorial fumbling.
Unknown" obviously knows its limitations, and it doesn't bother to rise above them. It just keeps throwing the punches the audience wants and expects. It won't cure world hunger, but chances are it will sell a lot of popcorn.