"We all know the story. Four brave astronauts all head up into space and come back forever changed," a TV host character named Ted Gilbert, played by Mark Gatiss, says in the trailer. "Our city, our planet owe a debt to these intrepid souls. And while we can never repay them, we can certainly celebrate them."

First Steps" is here, and it's giving fans their first proper look at Julia Garner's Silver Surfer, warning of the arrival of Galactus. "Are you the protectors of this world?" she asks as she flies down into the city.