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Halle Berry doesn’t say “yes” to television work every day, but Steven Spielberg is a powerful lure.

The Oscar-winning actress stars in the executive producer’s home-screen latest project as CBS debuts the sci-fi thriller series “Extant” at 9 p.m. Wednesday. No one connected to the show seems to mind any thematic references to last year’s Oscar-winning movie “Gravity” as Berry plays another woman in space, this one newly returned home from a yearlong solo mission … but with a very unexpected development.

She discovers she’s pregnant, and if she’s confounded by the news, so are loved ones including her husband (Goran Visnjic, “ER”) and a doctor friend (Camryn Manheim, “The Practice”). Also factoring into the story is the married couple’s humanoid son (Pierce Gagnon), who’s at the crux of a scientific debate over what constitutes a soul.

Michael O’Neill (“Bates Motel”), Hiroyuki Sanada, Annie Wersching (“24”) and Meryl Streep’s daughter Grace Gummer (“The Newsroom”) are among other “Extant” cast members.

“I’m a fan of sci-fi, but I’m even more a fan of Steven Spielberg sci-fi, which is more supernatural,” Berry explained. “I love that this show is rooted solidly in strong characters before you get into the otherworldly aspects. You first get to know this family, and I think it’s a beautiful setup for what’s to come as we get further and further into the series.”

Indeed, “Extant” is based on Earth for a number of its initial scenes before the first flashback-cued sighting of a space station. Berry deems her character, Molly, “an everyday woman. Sure, she has an extraordinary job – I’m not suggesting that people go into space in a pedestrian way – but at the end of the day, she’s fighting for what every woman would fight for, and that’s her baby. No matter what that is, it’s hers, and it’s part of her.”

“Extant” was created by another of the series’ executive producers, Mickey Fisher, who had written the pilot simply on spec. He acknowledges that the success Spielberg, his Amblin Television firm and CBS had with “Under the Dome” last summer “really opened the door for us. I’d carried the idea around in my head in different versions; at one point, it was going to be a one-person play. Then about three years ago, I moved out to L.A. to try to break into TV, and I did the thing they always tell you to do as a writer: ‘Write the show that you would want to watch.’ ”

Enter Spielberg, who became a patron of “Extant” early on. “Even just the possibility that he would read it at all,” Fisher said, “that the most successful filmmaker of all time was going to read something I wrote, that in and of itself is a surreal thought. Then to hear that he liked it and that it was going forward … I tell people that I sat and stared at a wall for 15 minutes, trying to wrap my head around it.”

The executive producers of “Extant” also came to include showrunner Greg Walker, a veteran of series including “Vegas” and “The X-Files.”

The fact that “Extant” tackles big issues within a science-fiction wrapping was another major appeal for Berry. “That’s one of the reasons I love being a part of the ‘X-Men’ movie series as well,” she noted. “It puts those social questions out there. This one addresses nature vs. nurture, and what it is to be human – can we teach a machine to have human qualities and to love? This show is so layered, and not just in being set 30 years in the future. It deals with issues we face today, for sure.”