“What If...?” sneak peek reveals Storm's MCU debut as she teams up with Captain Carter (exclusive)

It's time to meet Marvel's new Goddess of Thunder.

X-Men's Storm is making her Marvel Cinematic Universe debut in Saturday's episode of What If...?, and Entertainment Weekly has an exclusive first look at the new wielder of Mjolnir after she was teased in the season 3 trailer.

The fan-favorite character is once again voiced by Alison Sealy-Smith, who has played Ororo Munroe a.k.a. Storm in X-Men: The Animated Series and Disney+'s revival X-Men '97, as well as Spider-Man: The Animated Series.

Related: Marvel TV boss talks 'bittersweet' final season of What If…? and teases 'melancholy' series finale

The exclusive clip (above) reveals the MCU's version of Storm works side-by-side with Captain Carter (Hayley Atwell) on a team with Kahhori (Devery Jacobs), a powerful Mohawk woman who was introduced last season, and Byrdie (Natasha Lyonne), a new character who makes her debut in this episode as well.

While Byrdie and Kahhori play a hilarious game of Avengers foosball ("Nobody snaps like Thanos!"), Captain Carter and Storm have a very serious meeting about a new threat facing all of reality. "We are looking at broken pieces of the fifth dimension itself," Captain Carter realizes. "The last time something like this rained down on the multiverse — "

"Infinity Ultron blasted through the observational plane and nearly destroyed all of existence," Storm says.

Related: All the MCU actors who voice their characters in Marvel's What If…?—and every recast role

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What If...? has been leading up to this moment all season long, as Uatu the Watcher (Jeffrey Wright) disappears in Saturday's appropriately-titled episode, "What If... the Watcher Disappeared?", due to his recent meddling in the lives of his favorite heroes. In Thursday's episode, "What If... the Emergence Destroyed the Earth?", three other Watchers began spying on Uatu as a result of him saving Riri Williams (Dominique Thorne) from succumbing to her fatal destiny. Now, it's up to Storm, Captain Carter, Kahhori, and Byrdie to save him ... and the rest of the multiverse.

Marvel TV boss Brad Winderbaum previously told EW that the final season of the creative brainstorming exercise — a.k.a. the wildly inventive and at times unhinged (in the best way!) animated series — will end in a "very bittersweet" and "melancholy" way. "For now it is, I think, a beautiful way to end this era and to culminate the story of the Watcher," he said. "The ending is both happy and sad."

The Disney+ MCU anthology series debuts new episodes daily until the series finale on Dec. 29.

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