The first installment of A Year in Space tracks astronaut Scott Kelly’s 12-month mission on the International Space Station, from launch to landing, as NASA charts the effects of long-duration spaceflight by comparing Scott to his identical twin on Earth, fellow astronaut Mark Kelly. Witness the rigors of Scott’s training to live in space for an entire year, while coming to know Scott's family and their collective fears, dreams, stresses, and loves. Interwoven into the series’ compelling personal story, A Year in Space also delves into the broader historical context of the mission, including the history of space exploration, the political background of the Russian-US relationship, and the science and engineering conundrums posed by interplanetary space travel.