The Girl on the Train
Rachel Watson, an alcoholic struggling with a recent divorce, commutes daily by train, fixating on a seemingly perfect couple, Megan and Scott Hipwell, who live a few houses down from her old home with ex-husband Tom. One day, she witnesses Megan kissing a man who is not Scott, and shortly after, Megan goes missing. Rachel, plagued by alcoholic blackouts and fragmented memories, believes she saw something crucial or even intervened the night Megan disappeared, and she inserts herself into the investigation, often hindering it due to her unreliability and the suspicion she draws. As Rachel grapples with her memory and tries to piece together the events, the police investigate Megan's secret life, revealing multiple affairs, including one with her therapist. Rachel eventually uncovers the truth: her ex-husband Tom had been emotionally abusive and gaslighting her for years, was having an affair with Megan, and was the father of Megan's unborn child. When Megan threatened to expose Tom, he murdered her and tried to frame Rachel for it. In a final confrontation, Rachel, supported by Tom's current wife Anna, defends herself against Tom's attack and kills him with a corkscrew.