Amelia confronts a difficult situation, while Meredith deals with the fallout from her conversation with Nathan. Maggie finds herself at an awkward family dinner, Jackson receives big news, and Richard and Bailey search for the stars of tomorrow.

Jackson decides he needs some time off and invites the guys to join him on a day out at sea. Meanwhile, Arizona, April and Maggie treat a woman who’s hiding a deadly secret.

After a roller coaster car falls off the track at the county fair, the doctors at Grey Sloan tend to patients who spark memories about ghosts from their past. The series 300th episode!

A hacker compromises the hospital’s computer system, causing monitors, phones, labs and patient files to all go down. As technology fails them, Bailey attempts to keep the peace but chaos erupts and the doctors are forced to get creative in their methods to treat the patients.

April is in charge of the new Grey Sloan Surgical Innovation Contest, and the doctors are eager to start their projects. Meanwhile, Catherine’s old friend has a shocking idea for Catherine and Jackson; and Meredith treats a returning patient who inspires her project.

Seattle firefighters Ben Warren and Andy Herrera head to Grey Sloan after rescuing two boys who were injured in a house fire; the doctors work on their projects for the surgical innovation contest; Amelia brings Tom Koracick in to consult.

Maggie and Jackson are enjoying spending time together, but he must turn his concentration toward the groundbreaking vaginoplasty surgery he has scheduled with Catherine and Richard. Meanwhile, Meredith and Jo hit a roadblock with their contest submission, so Jo helps Bailey with an incoming trauma patient who used to be an astronaut

An agent from ICE shows up at Grey Sloan in search of an employee who may be working in the U.S. under DACA. Alex’s patient Kimmie wants to leave the hospital to enjoy her final days, but Alex feels differently. Meanwhile, Arizona treats Matthew Taylor’s baby and April wants to do whatever she can to help.

During presentations on Grey Sloan Surgical Innovation Prototypes Day, Arizona shares cookies from an appreciative patient that, unbeknownst to her, contain a special ingredient. Meanwhile, Catherine reveals shocking details to Jackson about his grandfather's past; and Jo steps in mid-operation on a major surgery.

Alex and Jo go on a road trip to Iowa to find Alex’s mom, whom he hasn’t heard from in a very long time. Meanwhile, Meredith gives a presentation on her mini-livers project, which attracts a ton of attention; and Jackson works to rebuild the foundation after its reputation is threatened.

One of Grey Sloan Memorial’s own is seriously injured, making the team reflect on what is truly important to them. Meanwhile, Nicole Herman pays a visit to Grey Sloan and talks to Arizona about an exciting opportunity.

Meredith Grey and the team of doctors at Grey Sloan Memorial are faced with life-or-death decisions on a daily basis. They seek comfort from one another, and, at times, more than just friendship. Together they discover that neither medicine nor relationships can be defined in black and white.

New doctors continue to shake up the hospital in typical Grey Sloan manner. Meredith bonds with a patient while Jackson struggles with the meaning behind recent experiences; and after making a life-changing decision, Jo forms an unexpected alliance.

Meredith turns heads when she shows up to work done up and ready for her blind date later that day, while Alex makes a questionable decision in order to save a patient. Meanwhile, the burden of knowing Teddy’s secret keeps Maggie up at night, ultimately making her decide she has to tell someone.

Seattle is hit by a huge wind storm and Grey Sloan becomes inundated with patients. Alex and Jo are stuck at home and decide to make the best of it by having a second honeymoon, while Meredith confronts Richard about getting his life back on track. The winter finale.

When the power goes out at Grey Sloan, the doctors are left scrambling to save their patients' lives; Owen, Amelia and Teddy confront their complicated situation.

Patients flood the hospital after gunfire goes off at a parade; a blast from the past throws Maggie off her game on the same day that Meredith tries to talk to her about dating Deluca; Owen and Amelia get some potentially life-altering news.

Meredith breaks a hospital record; the doctors are sent scrambling in the wake of a massive overdose within the community; Jackson wants to take Maggie camping; Levi and Nico's relationship continues to develop.

Ties are strained as Andrew and Carina confront an unforgiving family history. Meanwhile, Teddy and Owen work together on a married couple who is expecting, and Amelia attends a conference for alternative pain relief.

Maggie introduces mood rooms as an alternative approach to medicine. Alex and DeLuca butt heads over an 11-year-old patient who tries to sabotage her own surgery. Jackson and Richard deal with a gender non-binary patient. Meanwhile, Teddy has a pregnancy scare that brings Owen and Koracick to odds.

When a trauma patient arrives at Grey Sloan, it forces Jo to confront her past. Meanwhile, Bailey and Ben have to talk to Tuck about dating.

Meredith debates how to handle an unexpected situation in her personal life, while Richard has an untimely reunion with an old friend. Jo has a hard time at work, and Owen tries therapy.

Alex tries desperately to save his patient Gus while he waits for a severely agoraphobic blood donor to arrive from London. Jo reveals to Meredith why she’s been so down, while Catherine and Bailey hold a meeting to get down to the bottom of an insurance issue. Meanwhile, Maggie and Jackson go camping.

As fog begins to cover Seattle, the doctors of Grey Sloan navigate through personal complications. Meredith and Alex attempt to save Gus, while Levi talks some sense into a struggling Nico.

Meredith, Richard and Alex must deal with the consequences after Bailey fires them from Grey Sloan for insurance fraud. After disappearing in the fog, Jackson helps a man in a dangerous situation, as his relationship with Maggie comes to a new crossroad. Meanwhile, Tom gets new responsibilities at the hospital that throw the doctors for a loop.

The doctors operate on a man who crashed into Maggie's car as Owen, back from paternity leave, struggles with Tom's new position. Meredith's recent firing doesn't stop her from diagnosing those around her. Richard and Alex start anew and it's not easy.

A patient at the hospital is brain dead after falling into a construction site, and her two sisters must decide whether or not to keep her alive.