'Extant' Season Finale Spoilers: Molly Goes Back Into Space to Save the Earth

Halle Berry stars in Extant on CBS.

Two episode remain in the first season of Extant, which airs Wednesdays at 10 p.m. ET/PT on CBS.

On the September 10 episode, "Before the Blood", 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.

Then on the September 17 season finale, titled "Ascension," Molly (Halle Berry) 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.

Extant stars Halle Berry as Molly Woods, Goran Visnjic as John Woods, Pierce Gagnon as Ethan Woods, Hiroyuki Sanada as Hideki Yasumoto, Michael O'Neill as Alan Sparks, and Grace Gummer as Julie Gelineau.

Camryn Manheim returns as Sam Barton.

Guest stars in the season finale include Sergio Harford as Marcus, Tessa Ferrer as Katie, Charlie Bewley as Odin, Tyler Hilton as Charlie, Adam O'Byrne as Ryan Jackson, Shannon Merrill Brown as Offspring, Enver Gjokaj as Sean Glass, and Jimmy Jean-Louis as Pierre.