Extant is a science fiction television series that follows astronaut Molly Woods, who returns to Earth after a year-long solo mission in space. She struggles to reconnect with her family, including her husband John, a robotics engineer, and their son Ethan, who is actually a humanoid robot created by John. As Molly tries to readjust to life on Earth, she discovers that she is pregnant, despite being infertile before her mission. This mysterious pregnancy leads her to uncover a larger conspiracy involving extraterrestrial life and a powerful corporation.