Do yourself a favor : skip this one.

Rating: Null/10 (24 October 2011)

Unknown is probably one of of the worst plot-twist driven movies : you know, this whole spawn of movies where, supposedly, a sudden plot-twist brings a new perspective to the events and the characters...
The scenario has been frankensteined from dozens other such movies, the acting is bland at best (Liam Neeson. Enough said. ) and the plot-twist is, well, just a plot twist : neither clever nor convincing, it only adds to the general feeling of implausibility.
A perfect example of what happens when lazy studios mix up "suspension of disbelief" for "scenario based on holes", this whole movie is an insult.