Grey's Anatomy, Season 12

Seattle Grace Hospital springs into action to save the lives of two young girls whose powerful story forces some of the doctors to revisit the effects of bullying on their own pasts. Meanwhile, Meredith adjusts to changes at home with her new roommates while Bailey continues to fight for the Chief of Surgery position.

The pressure is on as a determined Bailey tackles her first day as Chief; meanwhile, April's marriage is in jeopardy and she finds herself unable to address her problems; Meredith struggles to juggle all her responsibilities and Amelia works to define her relationship with Owen.

Maggie reevaluates her life choices after receiving an invitation to her ex-boyfriend's wedding; Richard questions Bailey's loyalty, and Jo confides in Stephanie about a secret she's been keeping from Alex. Meanwhile, Alex struggles with making a difficult decision that will affect the lives of newborn twins.

Owen suggests the interns learn a vital lesson on how to break bad news to patients' families, and Arizona's 90-year-old patient reassures her that she's destined to find love again.

In the midst of the sisters' dinner party, Maggie ditches her cooking duties to rush to the hospital. Meanwhile, April steps in to help cook as an attempt to avoid Jackson, and Arizona nervously waits to find out more about Callie's new girlfriend.

Grey Sloan Memorial welcomes a new transfer resident, and also a patient who's the topic of conversation after accidently sending his sex tape to his entire congregation. Meanwhile, Richard wrestles with how to progress his relationship with Maggie when an old friend visits the hospital, and April brings in a case of a young boy from the Middle East.

The team of doctors work on a high stakes case of a long time patient, adding additional pressure to an already tense environment. Meanwhile, Bailey wants Ben to kick out their new roommate, and Arizona is eager to get back into the dating world with a new wingman.

As the rumor mill around the hospital continues to spiral out of control, Grey Sloan Memorial is flooded with injured firefighters from a nearby wildfire. Maggie struggles to keep things with Andrew professional at work; meanwhile, Jo questions Alex's priorities.

Meredith is brutally attacked by a patient, and Penny is the one who discovers her. The doctors of Grey Sloan Memorial rush to stabilize Meredith and remain by her side in the harrowing aftermath.

As the hospital deals with Meredith's trauma, Callie and Maggie perform a risky, experimental surgery on Alex's 15-year-old patient against his professional opinion. Meanwhile, Owen and Nathan are still at odds with each other, and Maggie and Andrew's relationship continues to develop.

The evolution of April and Jackson's relationship is revealed through a series of flashbacks dating back to when they first met. Simultaneously, we follow the years-long progress of one of Jackson's patients.

A patient from Meredith’s very first surgery as an intern is readmitted to Grey Sloan Memorial with a new aneurysm, and Amelia takes her case. Meanwhile, Maggie suspects that Richard knows about her relationship with Andrew.

The Grey Sloan doctors travel to a military hospital to perform a risky surgery on a veteran with an advanced tumor. Meanwhile, Andrew is tired of being Maggie's worst kept secret; Ben makes an impulsive surgical decision; and a team of cheerleaders wreak havoc in the ER.

Richard throws everyone for a loop when he switches the resident and attending pairings, and Arizona takes a huge risk on a woman who is pregnant with quadruplets. Meanwhile, April is faced with a difficult decision.

Jackson learns about April's pregnancy, while Alex and the team of doctors handles an hours-long, triple-organ transplant surgery. Meredith considers dating again, and Andrew insists on not receiving special treatment after he and Maggie go public.

Meredith takes a step forward with Will but quickly regrets it, while Maggie senses a disconnection with Andrew. Meanwhile, Amelia reevaluates her relationship with Owen, and Catherine comes to town and shakes things up with April and Jackson.

Meredith goes on an ambulance ride with Owen and Nathan to pick up a heart for a transplant patient. Musician & MS patient Kyle Diaz is admitted to Grey Sloan Memorial with a tremor in his hand. Meanwhile, Catherine continues to insert herself into Jackson and April's business against Richard's wishes.

After a missing child forces the hospital into lockdown, Ben decides to operate on a pregnant mother without the proper surgical equipment. Miranda, as Chief, is faced with the repercussions of the event and whether or not Ben's actions were justified.

Miranda continues to deal with the aftermath of Ben's reckless decisions and forms an advisory committee to recommend proper disciplinary action. Meanwhile, April and Jackson try to put their differences aside for the sake of their baby, and Arizona makes a decision that could affect her relationship with Callie forever.

The doctors work frantically to save a young boy who was accidentally shot. Meanwhile, Arizona is upset when Callie tries to make an important decision about Sofia's future without consulting her.

Stephanie's relationship to Kyle becomes complicated. Meanwhile, Meredith encourages Amelia and Owen to choose to be a real couple. Arizona and Callie are at odds and put their friends in the middle of an uncomfortable situation.

Callie and Arizona are at odds over Sofia's future, and Stephanie questions the status of her relationship with Kyle. Meanwhile, Alex and April work on a pregnant teen that is readmitted to Grey Sloan Memorial.

Owen and Amelia take their relationship to the next level. Alex gains some clarity on his future with Jo, and Callie and Arizona continue to struggle with the current custody arrangement.

Meredith and Maggie support Amelia on an important day. Jo reveals she has been keeping secrets from Alex, while Arizona and Callie deal with the impact of their custody arrangement. Meanwhile, Ben leaps into action to help a friend.