Flammen & Citronen aka Flame and Citron (2008)

http://www.imdb.com/title/tt0920458/

4.5/5

a riveting story about the Denmark resistance in World War 2 and how you can't trust anyone in wartime, even your closest friends!!

This is only the 2nd film I've seen Mads Mikkelsen in, the first one being Casino Royale.

What else has he done that's worth watching?