‘Knox Goes Away’ Review: Michael Keaton Turns Another Hitman Film Into a Fascinating Character Study

What is it about hit men at this year’s fall film festivals? No sooner had Bill Hader’s “Barry” finished its final season and landed a batch of Emmy nominations than David Fincher’s “The Killer,” starring Michael Fassbender as a contract killer going about his daily (and deadly) work, premiered at the Venice Film Festival to largely favorable notices on its way to a Netflix release. A few days later it was followed by Richard Linklater’s “Hit Man,” with Glen Powell as a schoolteacher pretending to be an assassin, which picked up more raves as it premiered in Venice, then went to Telluride and the Toronto International Film Festival.