Molly returns to space in an attempt redirect the Seraphim away from Earth and protect the world's population from the deadly spores. Also, John discovers that Odin's plan has put Ethan in terrible danger.

When Molly finally comes face-to-face with her offspring, she realizes she may be the only one who can stop the coming danger. Meanwhile, Julie uncovers grave secrets about Odin.

As the offspring's powers grow, Molly learns of Yasumoto's painful path to immortality. When Sparks starts to have doubts about the mission, Anya takes charge. Meanwhile, Odin tries to secretly access Ethan's circuitry.

As Molly gets closer to finding her "offspring," John learns that Yasumoto might not have his family's best interests at heart, and Sparks commits to do whatever it takes to keep the "offspring" alive and maintain the visions of his dead daughter.

When Sparks falls under the influence of the vision of his deceased daughter, he flees with Molly's baby to a remote location. Now, Yasumoto and Molly must rely on each other to track down the offspring.

When Molly learns that her baby is alive, she sets out with Kern and Kryger to devise a plan to intercept the baby before Sparks and Yasumoto can relocate him. Meanwhile, John struggles to keep up with Ethan's rapid development.

Convinced the agency has her baby, Molly is determined to find out where.

Molly uncovers footage that may reveal the real reason the ISEA chose her for the solo mission.

When the validity of Molly's pregnancy comes into question, John begins to doubt her mental state.

After Sparks attempts to quarantine Molly, she and her family seek refuge on a remote island with her estranged father, Quinn.

Molly has to decide if she is going to reveal her pregnancy to John after he confronts her about her distant behavior. Meanwhile, John and Molly face parents who are suspicious of Ethan when he goes to school for the first time.

After Molly collapses and experiences a vision of her encounter on the Seraphim, Sam agrees to give her an ultrasound so she can learn more about her mysterious pregnancy. Also, Molly tracks down Kryger and he reveals the disturbing details of his own solo mission that the International Space Exploration Agency is keeping secret.

Astronaut Molly Woods tries to reconnect with her husband, John, and son, Ethan, after returning from a 13-month solo mission in outer space. Molly's mystifying experiences in space lead to events that will ultimately change the course of human history.