Comedian and space enthusiast Helen Keen (creator of BBC Radio 4's multi-award-winning It Is Rocket Science) welcomes you to a podcast inspired by space travel in general and Tim Peake's mission to the International Space Station in particular. In this month's show we celebrate the 25th anniversary of the first Brit in space Helen Sharman, and she tells us what Tim Peake can look forward to on his ride back to Earth. We talk to materials chemist Dr Suze Kundu about the challenges of travelling to other planets, and to Saturday Morning Breakfast Cereal's Zach Weinersmith on evading the robot overlords of the future...