Chris Austin Hadfield OC OOnt MSC CD is a Canadian retired astronaut, engineer, singer, fighter pilot and author. The first Canadian to perform extravehicular activity in space, Hadfield has flown two Space Shuttle missions and served as commander of the International Space Station (ISS). Prior to his career as an astronaut, Hadfield served in the Canadian Forces for 25 years as an Air Command fighter pilot.  Dennis and he discuss his book, The Apollo Murders.