Bill Nye is retiring his kid show act in a bid to become more like his late professor, astronomer Carl Sagan. Sagan dreamed of launching a spacecraft that could change interplanetary exploration. Bill sets out to accomplish Sagan's space mission, but he is pulled away when he is challenged by evolution and climate change contrarians to defend the scientific consensus. Can Bill show the world why science matters in a culture increasingly indifferent to evidence?

Bill Maher interviews some of religion's oddest adherents. Muslims, Jews and Christians of many kinds pass before his jaundiced eye. Maher goes to a Creationist Museum in Kentucky, which shows that dinosaurs and people lived at the same time 5000 years ago. He talks to truckers at a Truckers' Chapel. (Sign outside: "Jesus love you.") He goes to a theme park called Holy Land in Florida. He speaks to a rabbi in league with Holocaust deniers. He talks to a Muslim musician who preaches hatred of...