Episode 1 | Seal Our Fate

Following the storm, a mudslide injures first responders and citizens.

Episode 2 | I Want You with Me

Callie makes a decision about her relationship.

Episode 3 | Everybody's Crying Mercy

Derek and Meredith adjust to life at home with their newborn.

Episode 4 | Puttin' on the Ritz

The doctors put together a fundraising gala.

Episode 5 | I Bet It Stung

Meredith struggles to balance her roles as a surgeon and a mother.

Episode 6 | Map of You

Callie and Derek collaborate on a brain mapping project.

Episode 7 | Thriller

Costumed patients create a challenge for the doctors; Derek and Ben work on a new surgical technique; Richard asks a resident to perform his next surgery, angering Bailey.

Episode 8 | Two Against One

A betrayal intensifies the issues between Cristina and Meredith; Matthew and April make a decision about their relationship; Bailey faces difficulties with Ben's return.

Episode 9 | Sorry Seems to Be the Hardest Word

Callie's career is on the line when she is being sued for negligence after an operation on a star athlete goes horribly wrong.

Episode 10 | Somebody That I Used to Know

Ben worries that an innocent conversation with Derek could end up causing problems for Bailey; Cristina turns to Shane as tension with Meredith increases; April's upcoming wedding creates an uncomfortable situation for Stephanie a...

Episode 11 | Man on the Moon

April's visiting sisters get on her nerves; when Matthew and Jackson witness an accident, they must work together; Callie and Arizona work on their relationship.

Episode 12 | Get Up, Stand Up

Meredith and Cristina bicker about their careers; Bailey talks to Ben about him moving back to Seattle; Shane puts himself in a risky situation; Derek receives a life-changing phone call.

Episode 13 | Take It Back

The doctors face the consequences of the events that took place at April's wedding. Meredith feels betrayed when Derek goes back on a promise, Alex is furious after returning to the hospital and hearing the news about his father, ...

Episode 14 | You've Got to Hide Your Love Away

Couples panic when the hospital announces a nonfraternization policy; Owen and Emma discuss the future; Meredith and Cristina have some girl time; Richard asks the residents for help with a rare cancer case.

Episode 15 | Throwing It All Away

Arizona's bad day escalates when she advises a patient on a potential double amputation; Derek breaks a promise; Stephanie and Jo find an abandoned baby; the nonfraternization rule leads to a suspension.

Episode 16 | We Gotta Get Out of This Place

Richard is given a rare case for his birthday, given by Bailey. Catherine Avery returns to try to talk sense into Jackson for marrying April.

Episode 17 | Do You Know?

Follows Christina's life as she wonders how her life would take shape based on a single decision.

Episode 18 | You Be Illin'

The doctors of Grey Sloan Memorial Hospital succumb to an infection that spreads like wildfire. Cristina deals with a complex case involving siblings and Alex begins to consider his future in the hospital.

Episode 19 | I'm Winning

Meredith and Bailey tackle jealousy as Cristina receives an early morning phone call that might change her life; Callie comes to a shocking realization and Alex makes a decision.

Episode 20 | Go It Alone

Callie and Arizona discuss having another baby, Derek has a hard time juggling work and family, Jackson and April have their first big fight and Christina attends the Harper Avery Award Ceremony. But is she going to win?

Episode 21 | Change of Heart

Derek's sister Amelia comes for a visit; Alex confronts Arizona and the rest of the hospital about his decision; Dr Webber finds out the truth about Harper Avery award from Catherine.

Episode 22 | We Are Never Ever Getting Back Together

The doctors work together to operate on two sisters joined at the head; Cristina travels to Zurich where she deals with a blast from her past; Richard voices his concern over the hospital's allegiance with the Harper Avery Foundat...

Episode 23 | Everything I Try to Do, Nothing Seems to Turn Out Right

While Bailey faces dire consequences for her reckless behavior, Cristina interviews candidates for Dr. Russell's replacement. Alex returns with a motive, disappointment hits Callie and Derek brings forth a shocking proposal to Mer...

Episode 24 | Fear (of the Unknown)

Cristina must head to Zurich soon but she is unprepared to leave behind her life in Seattle. Fear runs amok throughout the hospital as an explosion in a shopping mall results in a mass casualty situation.