One Hour Photo (2002)

In "One Hour Photo," a lonely photo lab technician named Sy becomes obsessed with a seemingly perfect family whose pictures he develops. As Sy's fixation grows, he begins to intrude on the family's life and takes increasingly disturbing actions as he uncovers their hidden secrets. The film explores themes of loneliness, voyeurism, and the dark side of obsession. Robin Williams delivers a chilling performance as Sy in this psychological thriller.