Janora McDuffie

While Meredith faces the repercussions of messing with the medical trial, April tries to step up as chief resident; Cristina and Owen disagree.

Work and personal pressures leave Meredith on edge; formal interviews for the chief resident position begin; Lucy and Alex's relationship is tested.

Meredith and Derek's relationship concerns Zola's adoption counsellor; Alex notices he has become an outcast; Cristina makes a difficult decision.

Meredith's dishonesty is revealed, leading to unexpected consequences for her and others; Cristina is forced to choose between her relationship and her career; the new chief resident is chosen.

The residents try to impress Jackson's mother, Catherine Avery, when she comes to Seattle Grace to perform a groundbreaking surgery; Alex and Arizona encounter a familiar face in the ER; Bailey makes a choice about her love life.

The eldest daughter of a family involved in a car crash must make a difficult decision; Teddy asks Cristina to help with an OR patient; Lexie works with Mark's new girlfriend during a surgery.