So who killed Kiri? The suspects are piling up in the penultimate episode of the British psychological drama about the murder of a young black girl soon to be adopted by her white foster family. In the way of these things it's probably less about the who, more about the why. Secrets are tumbling out of the Warner family closet when the spotlight glares on the worried middle-class heads of the adoptive family, in particular mother Alice (Lia Williams) and son Si (Finn Bennett), whose relationship is heading in directions never countenanced in The Brady Bunch. As social worker Miriam, the wonderful Sarah Lancashire retreats to the background this week but gobbles an incendiary scene when confronted by the distraught Alice. LD

Movie

I, Robot (2004)

7Mate, 8.30pm

Great storytellers can do the impossible. They can make you care about whether an extra-terrestrial can escape gun-toting federal officials and be bicycled away to safety way beyond the moon. They can make you care so much about a robot that you cry. Well, American director Steven Spielberg and Egyptian-born Alex Proyas have. In Proyas' I, Robot, set in 2035, Detective Spooner (Will Smith) is sent to investigate the suicide of Dr Lanning (James Cromwell), genius designer of the new NS-5 robot. If you think this sounds like a film that pays homage to Ridley Scott's Blade Runner, then you are absolutely right. The first act is beautifully made, each moment lovingly crafted by Proyas, and with New Zealander Simon Duggan's radiantly crisp photography making everything a joy to behold. It is true that I, Robot never develops as fully as it should – the plot becomes predictable and the fight scenes are silly – but, like Stanley Kubrick's 2001: A Space Odyssey, it manages to imagine and create electronic and mechanical beings souls that move us. SM

Pay

Max Grundy

Thursday, Discovery Turbo, 8.30pm

Max Grundy is an American custom-car guy with a singular aesthetic. He specialises in extreme makeovers for cars and trucks from the '50s and '60s, and his retro-futuristic style is all about the Space Age and the Atomic Age – right down to custom leather seats upholstered with giant mushroom clouds towering over shattered cities. The first of tonight's projects is a 1954 GMC cab-over-engine box truck, which Grundy wants to turn into a "rolling fist" complete with mean-looking chop-top and an air-ride system that will allow him to lower the box until it's practically scraping the ground. The second project is a big-finned '61 Chrysler with a bizarre "executive option" that was presumably much more fun for '60s businessmen than it was for their secretaries. The projects are ambitious, and the show is an engrossing one that really stands out among its countless contemporaries. BN