Liam Neeson and director Jaume Collet-Serra, who collaborated on the action hit Non-Stop (2014), reunite for this misbegotten thriller about extortion and murder on a New York commuter train. As in the earlier movie, Neeson plays a troubled ex-cop who’s forced to meet the impossible demands of mysterious villains, pronto, or people will die. Vera Farmiga is the femme fatale who pressures Neeson to find and kill another passenger, a federal witness in a corruption case, though she delivers most of her lines offscreen, haranguing the hero by cell phone. The film is hobbled by sloppy camera work, ludicrous fight scenes, hairbreadth escapes, and altogether too many suspects. With Patrick Wilson, Elizabeth McGovern, and Sam Neill.