Masterpiece Mystery!

Wallander: Series II: The Man Who Smiled (3x17)

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Lawyer Sten Tostensson tells Wallander he believes his old father's death in a car crash was homicide but Wallander is reluctant to act until Sten is found hanged and the pathologist claims that he was murdered. Sten's secretary shows Wallander a postcard of Africa with a text threatening the lives of father and son and wealthy philanthropist Harderberg, a client of Sten's, admits to also having received one.All were posted from the same hotel,apparently by industrialist Jurgen Nordfeldt, who survives an attempt to kill him.