Are we truly alone in the Universe? Ancient Astronaut theorists propose that descriptions of Sky Gods and Star Beings, might reflect real encounters with extraterrestrial visitors in the remote past. Could this be true? Follow experts Giorgio Tsoukalos, William Henry and Jason Martell as they sift through the series archives of “Ancient Aliens”, to uncover in-depth descriptions and portrayals of these entities from Egyptian, Sumerian, Chinese, Mesoamerican, and Native American traditions. Could the evidence reveal these beings to be… Ancient Astronauts?