This century has seen Liam Neeson in real leading roles, when his character "permeates" the whole movie and is strong and quick-witted. Taken 1 and 2 are best known, Unknown has - for some reason or another - remained in their shadow. In my opinion, the script of the latter is much stronger, has more twists-turns and unpredictable moments - me being a fan and active viewer of crime thrillers could not guess what kind of background could Neeson's character Dr. Martin Harris really have. Sequence of the events is logical and chases are visually enjoyable. The ending in general is predictable, apart from the very last scene.

Well, all the cast is excellent, not only Liam Neeson; Diane Kruger and Bruno Ganz are the supporting actors more time on screen and they are really good. In short, Unknown is really worth watching - especially if you have not read spoilers :)