Everyone's favorite sober-minded Vulcan, Spock, cracks a rare smile in a new, action-packed trailer for Star Trek: Discovery's upcoming second season. This go-round, the crew of the USS Discovery will be facing its greatest threat yet: a being or entity intent on wiping out all sentient beings in the Universe.

Discovery is a prequel to the original Star Trek, set roughly 10 years before Captain Kirk and his crew took over the USS Enterprise and boldly went where no man had gone before. The first trailer debuted at New York Comic Con back in October. That's when we learned that last season's Captain Gabriel Lorca has been replaced by iconic character Christopher Pike (Anson Mount). The Klingons have hair again (fans did not care for the bald look), and Michelle Yeoh returns as the former ruler of the Terran Empire, Philippa Georgiou.

We also saw the debut of Rebecca Romijn as Number One and got our first glimpse of a young, bearded Spock (now played by Ethan Peck). His appearance is linked to the mysterious vision of a "red angel" experienced by his adoptive sister, Science Specialist Michael Burnham (Sonequa Martin-Green). Spock also had recurring visions of such a creature, but the first trailer was coy about what it might mean.

YouTube/CBS All Access

YouTube/CBS All Access

YouTube/CBS All Access

YouTube/CBS All Access

YouTube/CBS All Access

YouTube/CBS All Access

YouTube/CBS All Access

YouTube/CBS All Access

YouTube/CBS All Access

YouTube/CBS All Access

YouTube/CBS All Access

YouTube/CBS All Access

Science Specialist Michael Burnham (Sonequa Martin-Green)

YouTube/CBS All Access

YouTube/CBS All Access

This second trailer expounds a bit more on what, precisely, is at stake. Georgiou and Section 31 are alarmed by the appearance of several red bursts, which typically signal the arrival of the red angel. They think the mysterious figure should be considered dangerous. Spock is not so sure.

But there is definitely cause for concern, since the red angel showed him an apocalyptic vision. "Someone or something is going to end all sentient life in the galaxy," Spock tells Pike. "There is a great responsibility at hand. This could be the defining moment for multiple civilizations, millions of lives. The future may be determined by our actions—yours and mine."

Chances are, the crew of the USS Discovery will emerge victorious, since, as Saru (Doug Jones) says, "Discovery will not allow a catastrophe on her watch." No matter the outcome, season 2 looks like it could be a wild ride.

Star Trek: Discovery S2 will debut on CBS All Access January 17, 2019.