Season 1 of Extant premiered on July 9, 2014.

Molly Woods, an astronaut with ISEA (International Space Exploration Agency) is assigned a 13-month solo mission aboard space station Seraphim. She returns home to her husband John, a robotics engineer who created their son Ethan, a prototype android called a "humanich". When Molly discovers that she has mysteriously become pregnant despite years of infertility, she begins a search for answers.

Season 2 of Extant premiered on July 1, 2015.

After the death of her husband and losing her son Ethan, Molly Woods battles internal and external struggles to pick the pieces of her life back up and start fresh, this time working with the very people who betrayed her.