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.
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 and Jackson.
As Callie is faced with a malpractice suit, her supportive father (Hector Elizondo) visits and shares a secret; past details about Callie and Arizona's marriage are revealed.
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.
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.
A sexually transmitted disease affects members of the hospital staff.
Meredith becomes disenchanted with her ignorance of parts of Derek's life.
Derek and Meredith try to be discreet after spending the night together.
Alex works hard to gain the trust of Annie, a patient with a large tumor.
Meredith believes she erred during surgery and endangered her career.
Cristina's encounter with a former nurse changes her forever.
The emergency room fills with patients from the annual bike-messenger race.
Meredith puts her career on the line to save a newborn
Meredith Grey and four other surgical interns try to balance life and work.
Like Richard, Bailey has a disease that can't be cured. Richard's speech does the trick and Bailey takes the first step to reclaim her place in OR.
Since they're good, Matthew tells Jackson he should come to the wedding. It would mean a lot to April if he were there.
April has put up with a lot since her sisters' arrival, but the teasing is the last straw. She fires them and appoints her friends from Grey + Sloan as her new bridesmaids.
Shane's courage with Meredith really left an impression with Cristina. Shane can finish his "extra credit" while they wait for the 3D model to finish.
Jimmy didn't recognize his son until he got punched at the bar. Alex doesn't care about that or the fact he's going through withdrawal, he wants him out.
Kick him out!
Have You Seen Me Lately?
Hook, Line and Sinner
I Will Survive
Take the Lead