The redheaded man, whose name is later revealed to be Andy, is a commuter who lives in the London suburb of Witney. He often rides the train to and from the city at the same time as Rachel. On the fateful Saturday night when Rachel travels to Witney to confront Tom and Anna, she remembers little from her blackout except for the redheaded man helping her up the stairs near the station after a fall. Rachel begins to fear the redheaded man, believing that he harmed her in the underpass or was otherwise connected to Megan’s murder—yet Andy eventually reveals himself to be a harmless, fun-loving man who simply came to Rachel’s aid in a moment of need.