M.D. Skeet, a man known to many as simply "Skeet," is an ISA (International Society of Arboriculture) certified arborist with Bartlett Tree Experts. He visits the studio to talk about summer and fall tree care. Carey Gillam, author of Whitewash: The Story of a Weed Killer, Cancer, and the Corruption of Science. returns to the show in the wake of a $289 million judgment against Monsanto Company and its weed killer glyphosate, the active ingredient in Roundup.