Jase and Simon roll into Birdville and fill up every spare container with fuel before starting their 500k trip across the Simpson Desert. After a chat with a cold-blooded local, they head for the hills and give those dunes a go. They're in for a couple days filled with ups and downs with more than 1100 dunes to cross. Day two is… more dunes. More ruts. More shoveling. But they finally make it to Poeppel Corner, where Queensland, Northern Territory and South Australia meet. We also hear from Bill Kitson of the Queensland Museum who explains how that original marker was a bit out from where they were meant to be. Day 3 and there's another 190kms to go. So it is another day and another night in the desert. But breakfast means it's time for a cook-up, and Jase concocts a Bush Brekky Cake. Day 4. Sand. And more sand. But is it a mirage or Dalhousie Springs on the horizon? Next stop: the geographical centre of Australia!