Though Grey’s Anatomy is notorious for going on random hiatuses without warning, the show is gracing us with its presence tonight, Thursday, March 21, with an all-new episode.

And this isn’t just any ol’ episode — Season 9, Episode 18: “Idle Hands” is relationship-centric, drama-filled, and most importantly, features MerDer’s baby!

We’ve rounded up all the spoilers about tonight’s big episode, including Meredith and Derek playing the name game with their baby-to-be (and Mere being insanely paranoid about all of the health defects their baby could have); Callie and Arizona doing the deed; Alex trying to woo Jo; and Bailey butting heads with Jackson as she tries to push forth a new project.

If that isn’t enough for you, we’ve also carefully analyzed the promos, discovering that there are some big changes ahead for the newly-named Sloan Grey Memorial Hospital — and its employees, natch.

Will you be watching? Tell us below, and catch the all-new episode of Grey’s Anatomy tonight, Thursday, March 21, at 9 p.m. ET/PT on ABC.

Alyse Whitney is an editor at Wetpaint Entertainment. Follow her on Twitter @AlyseWhitney.