Episode 1
Aired Sep 24, 2009
Good Mourning
Members of the hospital staff find unique ways to deal with their grief at George's death; George's mother faces the daunting task of deciding what to do with his organs.
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Episode 2
Aired Sep 24, 2009
Goodbye
Members of the hospital staff find unique ways to deal with their grief at George's death; George's mother faces the daunting task of deciding what to do with his organs.
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Episode 3
Aired Oct 1, 2009
(I Always Feel Like) Somebody's Watchin' Me
Izzie returns to work; Seattle Grace residents position themselves to avoid layoffs; Cristina tries to work with Arizona in the pediatric ward.
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Episode 4
Aired Oct 8, 2009
Tainted Obligation
When Thatcher returns to the hospital with a failed liver, Meredith must save his life; Izzie empathizes with a tumor-riddled patient; annoyed with Cristina's competitive zeal, Mark tricks her into assisting on an unusual surgery.
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Episode 5
Aired Oct 15, 2009
Invasion
The residents of Seattle Grace and Mercy West vie for their careers as the hospital merger begins; Arizona stands by enraged Callie when Callie's father employs a priest to help convince her to date men.
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Episode 6
Aired Oct 22, 2009
I Saw What I Saw
When a burn victim unexpectedly dies in the ER, all the Mercy West and Seattle Grace residents must defend their actions in hope of saving their jobs.
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Episode 7
Aired Oct 29, 2009
Give Peace a Chance
When Isaac, a hospital lab tech, discovers he has an inoperable tumor wrapped around his spine, he turns to Derek for help; Derek challenges Richard's authority.
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Episode 8
Aired Nov 5, 2009
Invest in Love
The parents of Arizona's 10-year-old patient offer the hospital a generous donation, but Arizona finds herself in a conflict of interest when the patient's condition worsens; Cristina tests her boundaries with Owen.
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Episode 9
Aired Nov 12, 2009
New History
Owen recruits a fellow Iraq War veteran to be the new cardiothoracic surgeon, but Cristina questions the new surgeon's abilities; Izzie returns with her high school mentor seeking treatment for dementia.
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Episode 10
Aired Nov 19, 2009
Holidaze
As the holiday season passes, Miranda is visited by her father, who disapproves of her life choices; Mark and Lexie must cope with the arrival of a woman from his past; Thatcher questions the chief's recent behavior.
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Episode 11
Aired Jan 14, 2010
Blink
Addison returns to Seattle to perform a procedure on Mark's pregnant daughter; Cristina is assigned the lead on a complicated surgery.
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Episode 12
Aired Jan 21, 2010
I Like You So Much Better When You're Naked
After learning about Richard's drinking problem, Derek confronts him; Izzie returns, hoping to reconcile with Alex; tensions run high for Teddy, Cristina and Owen in the aftermath of Cristina's startling confession.
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Episode 13
Aired Feb 4, 2010
State of Love and Trust
Derek faces a lawsuit on his first day as interim chief when a patient awakens from anesthesia during surgery; Mark refuses to speak to Lexie.
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Episode 14
Aired Feb 11, 2010
Valentine's Day Massacre
The doctors treat dozens of people when the roof of a romantic restaurant collapses on Valentine's Day; Meredith struggles with her new duties as the chief's wife.
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Episode 15
Aired Feb 18, 2010
The Time Warp
Callie, Bailey and Richard present pivotal surgical cases from their pasts when Derek restores the hospital lecture series.
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Episode 16
Aired Mar 4, 2010
Perfect Little Accident
A famous surgeon is rushed to the hospital; Callie and Arizona try to help Teddy and Sloan move on from their pasts.
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Episode 17
Aired Mar 11, 2010
Push
Owen and Richard compete for an extremely difficult surgery; Bailey gets ready for another date with Ben.
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Episode 18
Aired Mar 25, 2010
Suicide Is Painless
A patient's desire to end her life triggers haunting memories for Hunt; Arizona and Callie have different opinions about the future; Richard tries to adjust to his new role.
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Episode 19
Aired Apr 1, 2010
Sympathy for the Parents
When Alex's brother shows up at the hospital with a hernia, Alex must get Bailey's approval for pro-bono surgery; parts of Alex's past are revealed to his friends and colleagues.
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Episode 20
Aired Apr 29, 2010
Hook, Line and Sinner
Mark, Teddy, Callie and Arizona help Sloan deliver her baby; the doctors treat a crab boat captain who was stabbed with a giant shark hook.
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Episode 21
Aired May 6, 2010
How Insensitive
Bailey requires the team to have sensitivity training before admitting a 700-pound patient with numerous medical issues; Derek comes face-to-face with a former patient's husband in a wrongful death deposition.
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Episode 22
Aired May 13, 2010
Shiny Happy People
All reassess their personal lives after witnessing a chance reunion between two long-lost lovers in the emergency room; Karev treats a troubled teen (Demi Lovato); Meredith shares her suspicions with Cristina.
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Episode 23
Aired May 20, 2010
Sanctuary
The hospital is hit with an unprecedented crisis; Meredith and Cristina's surgical skills are put to the test.
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Episode 24
Aired May 20, 2010
Death and All His Friends
The hospital is hit with an unprecedented crisis; Meredith and Cristina's surgical skills are put to the test.
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