Continuity mistake: In the scene when Liam Neeson wakes up from unconsciousness following his car accident, the nurse writes something on her notepad with her right hand, but in the next shot the pen has suddenly switched to her left hand as she puts it into her pocket.
Continuity mistake: When the nurse is giving Liam Nelson the address of the investigator, in one shot she's writing the note with her left hand, and in the next shot, she has the pen in her right hand.
Character mistake: When the EMTs are resuscitating Dr. Harris, they use a defibrillator despite their being on a wet metal dock. Not only is this highly dangerous to absolutely everyone present, it would be completely ineffective at restarting his heart as the water and the metal would dissipate the electric current too much for it to do any good. At the very least, they would have stabilized his spine then moved him to a dry surface before beginning defibrillation.
Factual error: In the last scene the ICE Train is leaving the station eastbound. It is not possible to enter these trains at the central station because all eastbound trains end in Berlin and have only one station left (Berlin Ostbahnhof). Every ICE leaving Berlin is going in the other (westbound) direction.
Continuity mistake: When Liam Neeson's character is in the crash into the river, he bangs his head on the glass, and the scar is seen to the viewer to be on the right hand side of his head, but during the car chase scene, the scar can be seen changing sides from left to right really frequently.