In 1961, United Nations secretary-general Dag Hammarskjöld’s plane mysteriously crashed in Northern Rhodesia while en route to ceasefire negotiations in Katanga, killing Hammarskjöld and most of the crew. Given Hammerskjöld’s unpopular stance against colonialism during the Cold War and advocacy for Congo’s independence, the “crash” was widely understood to be an assassination. With the case still unsolved 50-plus years later, Danish journalist, filmmaker, and provocateur Mads Brügger (The Red Chapel, The Ambassador) leads us down an investigative rabbit hole to unearth the truth. He, his Swedish private-investigator sidekick Göran Bjorkdahl, and a host of co-conspirators tirelessly pursue a winding trail of clues, but they turn up more mysteries than revelations. Scores of false starts, dead ends, and elusive interviews later, they begin to sniff out a crime more monumental and far-reaching than anything they’d initially imagined. In English, French, Swedish, and Danish with English subtitles. Director Mads Brügger (Denmark/Norway/Sweden/Belgium 2019) 128 min.