A scientific-based viewpoint into the possibility of an alien invasion. Do aliens exist? What do we do if we encounter them? SETI insiders, NASA astronomers, religious leaders, astrophysicists, sci-fi writers and Carl Sagan's own son unite to answer these questions, revealing SETI's decades-long quest to convert science fiction into science fact. Their fascinating insights, along with possible scenarios of what first contact might look like, create a riveting blend of suspense, intrigue and horror. The series showcases the remarkable scientists who are currently grappling with extraordinary questions about alien life including: what will aliens really look like? How will they sound? What might their worlds look like? And, of course, will they come in peace?