“Saturday Night Live’s” Colin Jost (left) and Michael Che host the 70th Primetime Emmy Awards, Monday on NBC.

Katie Couric returns with the 10th-anniversary edition of "Stand Up to Cancer" Friday on many networks simultaneously.

In this issue: Perennial winner? Kernza may be the next big thing, Bummper Crops: Farmers expect sunny outlook for harvest and Crop School: At the ISU Farm, a program focuses on clean water.