Arthur Harari’s The Unknown is a disturbing psychological body-swap thriller led by a gripping performance from Léa Seydoux. It follows photographer David Zimmerman and former catering worker Eva after a sexual encounter apparently leaves them trapped in one another’s bodies, forcing them to confront fear, guilt, sexuality, consent and the terror of feeling alienated from themselves. The review praises the film’s uncompromising moral ambiguity and refusal to provide easy explanations, while arguing that its provocative ideas are ultimately undermined by an exhausting length and limited variation.

The film treats the body swap as a literal crisis rather than a simple metaphor, with David experiencing feminine anxiety and Eva watching her family life disappear. Its unsettling eroticism and voyeuristic atmosphere draw clear comparisons with Alfred Hitchcock’s Vertigo and Rear Window, although the references can feel overly obvious. Despite avoiding contrived twists and committing fully to its characters’ discomfort, The Unknown is described as a 140-minute slog that gradually loses the ingenuity of its premise and offers only limited emotional or thematic nuance.