Clive Anderson tries to fathom the miracle of Christmas television. Why do we sit down in front of the box, year after year, with such high expectations, and then feel surprised when it feels like we've seen it all before? Mostly because, it turns out, we actually have seen it all before. He discovers why generations of Blue Peter presenters have created the exact same festive advent crown as their predecessors, and puts the spotlight on Christmas Top of the Pops, Morecambe and Wise, Nationwide's Christmas Panto, The Royle Family, Gavin and Stacey and one TV chef after another trying to come up with a variation on how exactly we should be cooking a turkey. Speaking of repetitive Christmas viewing; there's a repeat of Ireland's Favourite Christmas Toys on TV3 at 8.30pm.