《宇宙时空之旅：未知世界》（Cosmos：Possible Worlds） 在广阔无垠的时空中，有无数个尚待我们探索的世界，和等待我们诉说的故事。本季节目要带我们探索逝去和未来的世界。并带观众认识勇于探索这一切的人。

Renowned astrophysicist Neil deGrasse Tyson takes viewers on a journey through the infinite cosmos. Scientific concepts are presented clearly, with both skepticism and wonder, to give full effect.

A radio astronomer receives the first extraterrestrial radio signal ever picked up on Earth. As the world powers scramble to decipher the message and decide upon a course of action, she must make some difficult decisions between her beliefs, the truth, and reality.