Writes Roger Ebert:
Is there a term for the Paradox of Intended Accidental Consequences? That's when a movie shows something that must be an accident, and it turns out to be part of a plan. Since "Unknown" opens with examples of such events, it won't be a spoiler for me to discuss them. I'll bail out before the tricky stuff.
As the movie opens, we meet Dr. Martin Harris (Liam Neeson) and his wife, Elizabeth (January Jones), who are on a flight to a biotechnology conference in Berlin. I'm thinking all we need to know about biotechnology in a thriller is that it probably involves either genetically altered crops or dangerous plagues. Anyway, at the airport, Dr. Harris lets a guy load his luggage, and as the taxi leaves, we get a big shot of his briefcase, still on the luggage trolley.
So OK. Was this an accident? If I'm carrying a briefcase that contains a cure for world hunger or a formula of mass destruction, I'm not gonna leave it on the curb. Anyway, Dr. Harris and his wife get to the hotel, she starts to check in, he realizes his briefcase was left behind, and without telling her, he grabs another taxi to the airport. He tries to call her, but can't get a signal. Ever had that happen to you in Berlin?
The Complete Review Here. http://www.rogerebert.com/apps/pbcs.dll/article?AID=/20110216/REVIEWS/110219990/1023