Diggin' Earth / Mindy's Mystery.Diggin' Earth: The kids try to dig into the Center of the Earth (a la Commander Cressida), but after finding out that the center is much too hot and the layer of Earth leading up to it is solid rock, they re-vamp their plans. They decide to become the kids to dig down the deepest into the Earth. Learning about the layers of the Earth inspires Jet to make an Earth Layer Cake.
Mindy's Mystery: Mindy can't sleep one night, having been kept awake by a sweet, strong smell from outside. Sydney, Sean, Jet, and Sunspot become detectives and try to crack the case of the sweet smell. At the same time, Mitchell is investigating what kept him up last night - a very bright "annoying" light. In the end, there's a common source - the sweet smell was from a nocturnal flower, the Moonflower, which only blooms at night, after sundown. And the bright light was from the Moon.