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In Berlin for a conference, scientist Liam Neeson is travelling in a taxi driven by illegal immigrant Diane Kruger when it is involved in an accident.

He’s in a coma for four days but, when he wakes up, his identity has been stolen. His wife (January Jones) claims not to know who he is, while another man (Aidan Quinn) has taken his place as her husband.

Has the accident due something to his mind, or are more sinister deeds afoot..?

Ideally cast Neeson gets into action-man mode to find out the truth and the result is a breathlessly exciting – if implausible – conspiracy thriller that races full-pelt towards a surprise plot twist and a splendidly satisfying climax.