Lucy is a visually slick sci-fi action thriller that looks cool but doesn't hold up to any scrutiny. The entire premise is based on junk science that's been debunked for decades, which is frustrating for anyone who cares about actual brain science.

That said, if you can turn off your critical thinking and just enjoy Scarlett Johansson kicking ass with increasingly absurd superpowers, it's entertaining enough for a Friday night. Luc Besson knows how to shoot action, and the visual effects showing Lucy's expanding consciousness are genuinely creative.

But let's be clear: this is violent, dark, and morally murky. It's not trying to be a family film or have any redeeming educational value beyond 'drugs are bad and also give you superpowers?' The 67% critic score and 6.4 IMDb rating tell you what you need to know—it's a middling action flick that's more style than substance.

For parents: keep this one far away from kids. For adults who like sci-fi action and can forgive terrible science: it's a decent rental when you want explosions and don't want to think too hard.