"The Dissident” tells that story, along with the complicated quest for the truth in the 16 months since. It features a slew of details from Turkish investigators alleging how the killing was committed and covered up; on-camera interviews with figures like Khashoggi’s Turkish fiancee, Hatice Cengiz; and a parallel story of Khashoggi’s fellow dissident taking refuge in Quebec, whom the film shows to be subjected to similar targeting.