Grey's Anatomy

While Meredith faces the repercussions of messing with the medical trial, April tries to step up at Chief Resident; Cristina and Owen disagree.

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

The chief makes a decision that shocks everyone at Seattle Grace; Owen and Cristina attempt to find normalcy; April struggles in her new role; the 5th-year residents receive their first solo surgery assignments.

A stampede at a comic book convention leads to an influx of colorful characters in the ER; Mark continues to make life difficult for Jackson.

The residents try to impress Jackson's mother, Catherine Avery, when she comes to Seattle Grace to perform a groundbreaking surgery.

Through Lexie, Meredith tries to get Derek interested in a patient's rare brain tumor; Callie ends up being annoyed when Mark and Arizona finally form a friendship.

Owen organiserer en baseballkamp mot Seattle Presbyterian, Lexie klarer ikke å styre sine følelser når hun ser Mark med ny dame, Alex kjemper for Zola, Richard snakker med Meredith og Bailey om deres krangel.

George O'Malley's mother comes to Seattle Grace for help after another hospital botches her surgery; a medical miracle inspires the residents; Jackson's suspicions about Mark and Lexie interfere with work.

Teddy is called away on another case, as Henry is brought in for emergency surgery; Derek and Meredith finally receive news about Zola; a patient experiences complications after surgery.

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

The doctors form two teams to operate on conjoined twins; Bailey uses Meredith as a buffer between her and Ben; Alex learns a tough lesson; Teddy asks Cristina about Henry's surgery.

Richard's 10,000th surgery is a liver transplant for two sisters; Derek and Lexie take on an 'inoperable' case; Teddy and Cristina try to swipe a case from Alex and Dr McQueen; Meredith tries to choose a specialty.

Meredith dreams of what her life would have been if her mother had been healthy.

Lexie watches Zola as Meredith and Derek try to have a night to themselves for Valentine's Day; Callie surprises Arizona with a romantic evening; Ben tries to prove that he knows Bailey better than she thinks.

Amelia arrives at Seattle Grace to beg Derek to help with a case.

As Adele's condition deteriorates, Richard considers making a change; an explosion at a coffee shop results in a busy ER; Callie helps Meredith study; Lexie helps Alex and Arizona care for an intern's premature baby.

Derek asks Meredith to work with him in neuro again; Catherine Avery comes back to Seattle Grace and takes an interest in Richard; Cristina becomes increasingly suspicious of Owen; Morgan may be falling for Alex.

An escaped lion puts lives and relationships in danger; Lexie hears Mark talking about moving in with Julia; Teddy begins to come to terms with Henry's death; Callie asks Arizona about her past relationships.

Cristina makes Owen tell her about the intimate details of his affair; Mark takes his authority very seriously when he steps in as Chief for the day; Arizona, Callie and Bailey plan special night for Teddy.

The doctors treat a Jane Doe who turns out to be the subject of a nationally followed case; the residents begin their interviews for post-residency positions; Richard faces a disturbing realization while visiting Adele.

The residents travel to San Francisco for the oral boards; sparks fly when Richard and Catherine bump into each other at a hotel; Alex feels guilty.

The residents agonize over their upcoming exam results; Arizona's childhood friend needs medical help; the doctors try to help a patient missing one third of his skull; Julia wants to start a family with Mark.

The residents choose their future positions; Mark admits to Derek that he still has feelings for Lexie; Arizona encourages her friend to have surgery.

A dangerous situation leaves the doctors fighting to stay alive while trying to save their peers; Ben and Bailey make a decision; Teddy gets a tempting offer; Richard plans a dinner for the residents.