Australia’s Best Backyards, 6.30pm, Seven The increasingly slick Jamie Durie touches down for his first show at Seven since his energetic appearances on Dancing with the Stars . It’s not exactly Backyard Blitz redux because, according to rule 27 of the big book of television cliches, everything now must have a competitive edge. So James and the team ( Andrew O’Sullivan and Fiona Bruyn) are going to show us the best back yards they can find. Each week a back yard goes into the final, and at the end of the series, the punters choose the winner. Fair enough. Chocolate Confidential, 9.30pm, LifeStyle Food Yet another investigation into the joys of chocolate. Eat it, pour it, sculpt it and watch it on pay TV. Not a lot of new ground, but lots of magical scenery from Paris to the Dominican Republic, where the world’s top chocolate judge reveals her verdict: ‘‘ This chocolate smells like the sweat of animals,’’ she huffs.