TV highlights 16/03/2012

The Culture Show 7pm, BBC2 Even by Culture Show standards, tonight's episode covers plenty of ground. Alastair Sooke chats with sculptor Anthony Caro ahead of his retrospective at Chatsworth House, and Andrew Graham-Dixon meets octogenarian collector Rose Lee. Get set, too, for Irvine Welsh talking punk literature, an interview with Philip Glass protege and composer Nico Muhly, plus Arlene Phillips on Reasons To Dance, and old soul rebel Kevin Rowland tells Mark Kermode about the return of Dexys. Jonathan Wright Helen's Polar Challenge For Sport Relief 8.30pm, BBC1 Blue Peter presenter Helen Skelton continues to show no regard for her personal safety as she embarks on a 500-mile trek across Antarctica for Sport Relief. She has already paddled the Amazon for it. Honestly, couldn't it ask anyone else? In temperatures as low as –36C, Skelton staggers her way through the icy wastes towards the south pole with a hacking cough. Amazing, but give her next year off. Get Geri Halliwell; she's not busy at all. Julia Raeside Modern Family 8pm, Sky1 The lure of the guest star can come to define a sitcom once it reaches a certain level of success: see 30 Rock's increasing reliance on big-name cameos (some might argue in inverse proportion to its funniness). Not so for Modern Family - even when a guest does appear, they never feel shoved in for the sake of it. Tonight, Greg Kinnear pops up as a prospective client for Phil, while Gloria and Jay have Mitch and Cam over to stay. Rebecca Nicholson Arena: George Harrison – Living In The Material World 9pm, BBC4 As with his Dylan documentary, Martin Scorsese's whopping George Harrison film is a masterclass in working with existing footage, and scoring some great new interviews. From the bequiffed guitar prodigy to the Beatles legend dying in a Swiss clinic, some three hours' running time later, Scorsese shows you all the shades of the notably recalcitrant Quiet Beatle. Musical adventurer, scouse rock'n'roller, wit, landscape gardener and, above all, true believer. The Georges we know (and some we didn't) are all here. Particularly good interviews are Klaus Voormann (early on) and Ringo (particularly at the very end). Tape it, do. John Robinson The Walking Dead 10pm, FX It's still the best zombie show on TV, but that's not much of a claim when it's also the only one. Although things seem to be improving of late, there's still that sneaking feeling that this series isn't quite living up to its potential. Recent news about casting for the next season sounds promising; at least one of the standout characters from the comic is coming our way. For tonight, though, the threat level is increased enough for the survivors to finally start night patrols. Just who or what is out there? Phelim O'Neill