Linda Spilker now heads the Cassini science team, and her mission has been extended yet again. She rejoins us to review the latest news from the ringed planet. Bill Nye answers Stephen Hawking's warning about talking to aliens. Emily Lakdawalla helps freeze a moment in time on Mars. Bruce Betts and Mat Kaplan have a copy of Paul Davies' The Eerie Silence" to give away as they talk about What's Up and announce a new space trivia contest."