It’s almost time for Grey’s Anatomy‘s Season 21 finale to air, and it sounds like things are going to be epic … and emotional.

Details about the final episode of the season have been revealed by ABC, and the synopsis is foreboding indeed.

The episode — which airs Thursday, May 15, alongside the finales for 9-1-1 Season 8 and Doctor Odyssey — is titled, “How Do I Live.” the logline for the episode reads, “While the interns are excited to transition to second-year residency, an ordinary day at Grey Sloan takes an unexpected turn when a medical emergency unfolds in the operating room, endangering lives inside the hospital.”

We don’t yet know what exactly it is that turns the OR into a danger zone, but at least one star of the show is hyping up what’s ahead.

Kim Raver, who plays Teddy Altman and directed a key episode of Grey’s Anatomy‘s latest season, told TV Insider of the finale, “It’s extraordinary. It is terrifying. It’s so Grey’s in the sense that I think people are going to be holding on to their seats while they’re watching. It’s like a quintessential finale. It’s so well designed and so well written and such a great springboard into Season 22. I am just sort of blown away by Meg [Marinis, showrunner]’s ability to come up with another complete cliffhanger on every front.” (It’s a good thing the show is already renewed for Season 22, then, because it sounds like fans will definitely be left clamoring for it.)

Leading up to the finale, Raver’s Teddy was left shaken by the sight of Owen Hunt (Kevin McKidd) in the arms of the woman he slept with during their open marriage trial. They were both supposed to avoid getting emotionally attached to their respective lovers, but the sight of him seemingly made it clear to her that Owen wasn’t abiding by that rule.

Photos of the episode are now available, so take a look at them below!

Grey’s Anatomy, Thursdays, 10/9c, ABC

– Reporting by Avery Thompson