The "Grey's Anatomy" Season 13 finale should bring major updates on at least two relationship fronts, in addition to major events at the hospital itself.

"Grey's" hasn't given us much on Alex Karev (Justin Chambers) and Jo Wilson (Camilla Luddington) in a while, but that will soon change. The synopsis for the May 18 season finale mentions Alex making a "hard choice" in his relationship with Jo. In the same episode, we'll see Meredith Grey (Ellen Pompeo) share some "big news" with Nathan Riggs (Martin Henderson), bringing their relationship to "a turning point."

(!) She's not pregnant again, is she?

The finale is Episode 24 and, at this point, Episode 22 has yet to air. Here are the titles and synopses for the final three episodes of the season:

"Leave It Inside," Episode 22 (May 4) "April and Andrew consult with a fiery patient who has a giant, inoperable heart tumor. Meanwhile, Alex and Eliza are at odds over the treatment of a young patient, and Stephanie and Ben make decisions that could affect their careers."

"True Colors," Episode 23 (May 11) "The doctors of Grey Sloan encounter a difficult case involving a dangerous patient. Meanwhile, Owen receives life-changing news that pushes Amelia to step up to support him, and Alex attends a medical conference after making a shocking discovery."

"Ring of Fire," Episode 24 (May 18) "The doctors' lives are at risk after a dangerous patient escapes the hospital room. Alex must make a hard choice in his relationship with Jo while Meredith has some big news for Nathan that brings things to a turning point."

So Alex will make a "shocking discovery" in the episode before the finale's hard choice about Jo. Don't forget that Matthew Morrison was seen with Justin Chambers when they were filming Episode 23 -- both wearing suits -- and Morrison is still being eyed as Jo's abusive estranged husband. There's a good chance Morrison's character, Dr. Paul Stadler, plays into Alex's hard choice about Jo. And, yeah, he's probably at this same conference.

The Season 13 finale sounds pretty intense, beyond whatever happens on the relationship fronts. A dangerous patient on the loose is bad, and may be part of the "shocking" event Kelly McCreary (Maggie) talked about.

"Grey's Anatomy" airs Thursdays at 8 p.m. on ABC.

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'Grey's Anatomy' Finale Has 'Big News' for Meredith & Riggs, and ... - Moviefone