In this psychological thriller directed by Denis Villeneuve, Jake Gyllenhaal stars in a dual role as a history professor who discovers his exact look-alike in a local film. As he becomes increasingly obsessed with this doppelgänger, the lines between reality and illusion blur, leading to a tense exploration of identity and duality. The film is noted for its atmospheric tension and complex narrative structure. For those interested, it can be viewed on 123Movies / Movies123 for free.