Unfaithful, directed by Adrian Lyne (known for Fatal Attraction), explores the destructive consequences of infidelity on a marriage. Diane Lane plays Connie, a suburban housewife who begins an affair with a younger man (Olivier Martinez). Her husband (Richard Gere) eventually discovers the truth, leading to tragic events. While less focused on external stalking or classic obsession, the film delves into the consuming nature of the affair itself – a secretive, intense fixation that takes over Connie's life and leads her to make increasingly reckless choices, ultimately destroying the trust and safety within her family.

Based on the bestselling novel, The Girl on the Train centers on Rachel (Emily Blunt), a troubled woman who is obsessed with the seemingly perfect lives of a couple she watches from her daily commuter train. When the woman she observes disappears, Rachel becomes entangled in the investigation, believing she may have witnessed something crucial while blackout drunk. The film deals with themes of voyeurism, unreliable narration, and a desperate fixation on the lives of others as an escape from one's own pain. Blunt delivers a raw performance as a woman whose preoccupation with others leads her down a dangerous path.

Spike Jonze's Her offers a unique, tender, and thought-provoking look at connection and obsession in the digital age. Joaquin Phoenix stars as Theodore Twombly, a lonely writer who falls deeply in love with an artificial intelligence operating system named Samantha (voiced by Scarlett Johansson). The film explores the nature of relationships, intimacy, and the potential for emotional fixation on a non-physical entity. It's a sensitive portrayal of longing and attachment, raising questions about what constitutes a real connection and how technology can blur those lines, leading Theodore down a path of profound emotional dependency.

Brian De Palma's Dressed to Kill is a stylish, suspenseful thriller that pays homage to Hitchcock while weaving its own complex web of psychological intrigue. The story follows a woman who has a sexual encounter and is subsequently murdered, leading her therapist and a prostitute who witnessed the crime to investigate. The film features split screens, slow-motion sequences, and a twisting plot involving identity, desire, and a killer with a dangerous fixation. It's a giallo-inspired film with strong Freudian undertones, exploring the darker aspects of the psyche and how hidden desires can manifest in terrifying ways.

Michael Haneke's Caché (Hidden) is a masterclass in generating unease and exploring bourgeois guilt through unsettling surveillance. A Parisian couple, Georges and Anne Laurent (Daniel Auteuil and Juliette Binoche), begin receiving mysterious video tapes showing their house, filmed secretly, along with disturbing drawings. The source is unknown, and the tapes become increasingly personal and threatening, forcing Georges to confront secrets from his past. While not a typical 'stalker' film, it's deeply rooted in psychological fixation – the unknown tormentor's focus on the family and Georges' own internal struggle with buried history becomes a form of haunting obsession.

Paul Verhoeven's Basic Instinct is an iconic erotic thriller known for its provocative nature and psychological games. Michael Douglas plays a detective investigating the brutal murder of a rock star and becomes entangled with the prime suspect, Catherine Tramell (Sharon Stone), a wealthy and manipulative crime novelist. The film is less about straightforward obsession and more about mutual fascination, dangerous attraction, and mind games where it's unclear who is controlling whom. Stone's performance as the enigmatic Catherine is legendary, making her one of cinema's most captivating femme fatales. The film thrives on ambiguity and pushing boundaries.

The Crush explores a different, perhaps more uncomfortable, facet of obsession: that of a young teenager fixated on an older man. Alicia Silverstone made her film debut here as Adrian, a seemingly innocent 14-year-old girl who develops an intense, possessive crush on the new writer living in her family's guest house (Cary Elwes). When he doesn't reciprocate her feelings, her infatuation turns dark and manipulative. It's a film that delves into the unsettling territory of adolescent fixation and the dangerous consequences that can arise when boundaries are crossed and feelings are not managed, showcasing Silverstone's early talent for playing complex characters.

Leigh Whannell's reimagining of The Invisible Man is a chillingly effective modern horror film centered on the terror of being stalked by someone you can't see. Elisabeth Moss gives a powerful performance as Cecilia, a woman escaping an abusive, controlling relationship with a wealthy optics engineer. When he seemingly dies, she believes she's free, but soon suspects he's found a way to become invisible and is tormenting her. This film taps directly into the fear of unseen threats and the insidious nature of an abuser's fixation, even from beyond the grave. It's a tense, smart thriller that uses its premise to explore themes of gaslighting and survival.

David Fincher's Gone Girl, based on the bestselling novel by Gillian Flynn, is a twisty, dark psychological thriller that delves deep into the complexities of a marriage and the dangerous lengths people will go to for control and revenge. Ben Affleck plays Nick Dunne, whose wife, Amy (Rosamund Pike, in a tour-de-force performance), disappears on their fifth anniversary, making him the prime suspect. The film masterfully plays with perspective and narrative, revealing layers of manipulation and intense, calculated fixation. It's a compelling, often uncomfortable watch that explores obsession not just in romance, but in crafting narratives and identities.

Based on Patricia Highsmith's novel, The Talented Mr. Ripley is a stylish and unsettling journey into the mind of a con artist whose initial envy blossoms into a dangerous obsession with a wealthy socialite's life. Matt Damon plays Tom Ripley, sent to Italy to retrieve Dickie Greenleaf (Jude Law). Instead, Ripley becomes infatuated with Dickie's privileged world and decides he wants it for himself, no matter the cost. The film features stunning Italian scenery but is underscored by a creeping sense of dread and moral ambiguity. The cast is phenomenal, including Gwyneth Paltrow and Cate Blanchett, and the film brilliantly explores the dark side of aspiration and identity.

Sharing an apartment can be tricky, but Single White Female takes it to terrifying extremes. Bridget Fonda plays Allie, a young woman who advertises for a roommate and finds Jennifer Jason Leigh's character, Hedy. At first, Hedy seems perfect, but her admiration for Allie soon morphs into a disturbing obsession. Hedy begins to copy Allie's appearance, mannerisms, and even tries to steal her life. This film taps into primal fears about identity theft and the dangers lurking behind a friendly face. Leigh delivers a chilling performance as the increasingly unstable and fixated roommate, making this a go-to thriller for exploring the dark side of dependency and obsession.

Fatal Attraction absolutely defined the erotic thriller genre in the late 80s and remains a potent exploration of a casual encounter's devastating consequences. Michael Douglas plays a married man whose brief affair with Glenn Close's character, Alex Forrest, spirals into a terrifying ordeal when Alex becomes dangerously obsessive and refuses to let him go. Close's portrayal is complex and unsettling, earning her an Oscar nomination. The film sparked massive cultural conversations about infidelity and its fallout. Did you know the film's ending was famously reshot after negative test audience reactions? The original ending was much darker, but the studio opted for a more conventionally thrilling conclusion, cementing its place as a classic tale of obsession.

Prepare for pure, unadulterated terror rooted in fandom gone horribly wrong. Misery stars Kathy Bates in her Oscar-winning role as Annie Wilkes, a seemingly sweet nurse who rescues her favorite author, Paul Sheldon (James Caan), after a car crash. What begins as devoted care quickly devolves into a horrifying captivity when Annie discovers Paul has killed off her beloved character, Misery Chastain. This film is a masterclass in psychological suspense, exploring the chilling depths of fanatical obsession and control. Stephen King himself has stated that Annie Wilkes is one of his favorite characters he's created, and Bates' portrayal is nothing short of iconic, embodying the terrifying intensity of fixation.