Cassini Deputy Project Scientist Linda Spilker rejoins us for another update on the incredibly successful Cassini-Huygens mission, but this time she is joined by her husband and colleague Tom Spilker, a principal member of the engineering staff at JPL, where he often serves as a mission architect. Bill Nye the Science Guy remembers Explorer 1 and its discovery of the Van Allen Belts. Emily Lakdawalla puts relativity to work in a new Q&A, and Bruce Betts goes to amazing lengths to give away a Planetary Radio t-shirt with Mat Kaplan. The boys also offer a new space trivia contest. Smoots, anyone?