As he tries to unravel the mystery behind this collusive subterfuge, he must overcome not only those who have rendered him a pariah, but must also confront his own dark past. Now his only hope lies with the female cab driver who is the only witness to the accident that he had suffered. To his dismay, he realizes that his identity has been taken by someone else as even Elizabeth refuses to recognize him. On arriving at the hotel, he confronts the security to arrange for a meeting with his wife. He is suddenly overcome by a desperate urge to unite with his wife and he leaves the hospital immediately. After overcoming a bout of temporary amnesia, he soon remembers of his wife and the purpose of their visit to Berlin. Harris is taken to a medical facility where he finally regains consciousness after spending four days in coma. The female driver of the cab, after rescuing him, flees from the scene. He takes a cab back to the airport in order to locate the missing luggage, but before he can inform his wife the cab meets an accident and falls off a bridge into the river. On reaching the hotel he finds some of his luggage missing.
No matter how implausible the script, he elevates the movie. Action sequences are well-executed and Liam Neeson owns this genre. Martin Harris, an American Bio-technologist, arrives in Berlin with his wife, Elizabeth, to attend a biotechnology submit. Unknown is a solid, disposable and moody riff on Hitchcockian conspiracy thriller by Jaume Collet-Serra.