""You are the dumbest smart person I've ever met"," growls Will Smith's robot-hating rozzer at cold fish scientist Susan Calvin (Bridget Moynahan) in this loose adaptation of Isaac Asimov's seminal android-exploring scribblings. As FX-driven extravaganzas go, I, Robot could well be the smartest dumb movie we've seen this year. Streamlining Asimov's geek-speak about positronic brains and ""three laws"" safety into bite-sized McNuggets, director Alex Proyas (The Crow) pits Smith against an army of malfunctioning metal-heads intent on world domination.

The mechanical `mystery' plot and occasional, shoehorned-in action scenes are balanced by an impressively moving CG turn from rogue robot Sonny (Alan Tudyk), several muted references to racial prejudice (""You just don't like their kind.") and a surprisingly vulnerable performance from Smith's conflicted hero. It's enough to ensure this enjoyably unpretentious tin-man drama knows exactly where its heart is.

DVD Extras:

The bog-standard single disc (£15.99) boasts a slick Making Of, stills gallery, gag reel and three yak-tracks with various crew members, the best of which has Proyas with screenwriter Akiva Goldsman. It's hard not to be cynical over the price hike for the Collector's Edition, but fans who splash the cash are richly rewarded: the second disc is stuffed with fine featurettes. Asimov's daughter pops up on Three Laws Safe discussing the themes of her late father's work, while CGI And Design shows how Tudyk (and a bazillion computers) made the soul-searching 'bot sci-fi cinema's answer to Gollum. Most entertaining is production diary Day Out Of Days, with actors prancing around in green motion-capture suits and the cheekily charming Smith showing off by pretending to be drunk. Funnier than it sounds, honest.