Question: Who directed  Norwegian action thriller film which s based on Nesbø's novel "Hodejegerne (The Headhunters)".
Sentence (from "Norwegian Ninja"): The film, based on a 2006 book, presents real-life espionage-convicted Arne Treholt as the leader of a ninja group saving Norway during the Cold War and stars Mads Ousdal as Treholt.
Relevant evidence: No