LoglineA shuttle accident leads to Spock’s Vulcan DNA being removed by aliens, making him fully human and completely unprepared to face T’Pring’s family during an important ceremonial dinner.
For real though, wtf happened with that mic drop reveal. Not that I'm complaining; I don't feel particularly excited to learn about another previously-unheard-of Spock sibling.
Then again, the amount of times Sarek's name was dropped in this episode is probably a clear breadcrumb that this storyline is coming sooner than later.