Grey's Anatomy Season 12 Recap: Top Moments

It wasn't too long ago that Grey's Anatomy Season 12 kicked off with Meredith adjusting to her two new roommates, Maggie and Amelia, Dr. Bailey fighting to prove she deserves the Chief of Surgery job, and Jackson preparing himself for April's return to Seattle in the premiere episode, "Sledgehammer." But the eventful and drama-filled season flew by, and it's almost time to check back in with the doctors of Grey Sloan Memorial for the Season 13 premiere, airing THURSDAY SEPTEMBER 22 8|7c.

In the Season 12 finale episode, "Family Affair," Meredith and Maggie supported Amelia on her wedding day, Jo revealed that she's been keeping secrets from Alex, and Callie and Arizona came to an agreement on their custody arrangement. Meanwhile, Ben rushed into action to help deliver April's baby when she went into labor at Meredith's house. To prepare for the upcoming Season 13 premiere episode, take a look back at some of the most important things that happened over the course of Season 12.

Season 12 Premiere: "Sledgehammer" - Meredith's sisters move in with her and her kids.

Episode 2 "Walking Tall" - Dr. Bailey becomes the hospital's first female Chief of Surgery.

Episode 4 "Old Time Rock and Roll" - Meredith comes face to face with Callie's new girlfriend, Penny Blake (Samantha Sloyan)... the doctor who killed Derek! 

Episode 5 "Guess Who's Coming to Dinner" - At the world's most awkward dinner party, Meredith announces to everyone that Penny killed Derek... and Bailey reveals Penny is the hospital's newest intern.

Episode 7 "Something Against You" - When the arrival of Dr. Nathan Riggs (Martin Henderson) mysteriously sends Owen to a dark place, Meredith offers to be his person

Season 12 Winter Finale: Episode 8 "Things We Lost in the Fire" - Alex proposes to Jo, Owen tells Meredith he had a sister, and alcoholic Amelia falls off the wagon when she lets Riggs buy her a drink

Season 12 Winter Premiere: Episode 9 "The Sound of Silence" - The doctors are all shaken when Meredith is brutally attacked by a patient, and must undergo a long and painful recovery.

Episode 11 "Unbreak My Heart" - Jackson and April sign divorce papers... the same day April finds out she's pregnant.

Episode 15 "I Am Not Waiting Anymore" - Meredith goes on a "date," with military surgeon Major Will Thorpe (Scott Elrod) -- her first since Derek

Episode 16 "When It Hurts So Bad" - Meredith ends her relationship with Will Thorpe before it really starts; Amelia breaks up with Owen.

Episode 17 "I Wear the Face" - Stephanie connects with an MS patient (guest star Wilmer Valderrama); Meredith lets Amelia move back in.

Episode 18 "There's a Fine, Fine Line" - Ben's impulsive and arrogant decision leads the death of a pregnant patient, and her baby, and puts his career in jeopardy.

Episode 19 "It's Alright, Ma (I'm Only Bleeding)" - Bailey suspends Ben for six months; Callie decides to follow Preminger Grant recipient Penny to New York.

Episode 20 "Trigger Happy" - Arizona hires an attorney to prevent Callie from moving Sofia to New York; Stephanie and Kyle start dating.

Episode 21 "You're Gonna Need Someone on Your Side" - Callie and Arizona prepare for a custody battle and must ask their friends to choose sides; Amelia and Owen go all in; Stephanie breaks up with Kyle.

Episode 22 "Mama Tried" - After a difficult trial, the judge awards sole custody of Sofia to Arizona.

Episode 23 "At Last" - Amelia proposes to Owen; Meredith and Riggs hook up; Callie dumps Penny; Jo tells Alex she won't marry him; Kyle passes away during an operation.

Episode 24 "Family Affair" - Amelia and Owen tie the knot; April and Jackson have a baby girl; Arizona shares custody with Callie (who's moving to New York); Jo's secrets send Alex down a dark path; Meredith and Riggs connect.

Can't wait until September 22 for a dose of gripping Grey's Anatomy drama? Read all of the Season 12 episode recaps, see Season 12 highlights, and re-watch the Season 12 finale of Grey's Anatomy for a refresher on how everything wrapped up last May.

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