It's time to bring the thunder as the doctors of Grey Sloan Memorial face stunning surprises, unprecedented challenges and life changing decisions. Secrets of the past come to light and critical choices shape the future. Relationships are in turmoil as things between Callie and Arizona cool - and Owen and Amelia's romance ignites. April and Jackson face a heartbreaking tragedy.
Meanwhile, Meredith makes a stunning family discovery as opportunities pull Derek further away. And Maggie's shocking announcement proves that blood is thicker than water.