|Episode Online Video|
S03, E14 (First Aired:
The doctors compete for Richard's affections; a surgical patient endangers the lives of those around her; Meredith's mother, who has Alzheimer's disease, experiences a change in her medical condition.
S03, E16 (First Aired:
Meredith's friends and fellow doctors work to save her life after her near-drowning; Izzie gathers her courage to perform surgery at the site of the ferry accident.
S03, E18 (First Aired:
The race for chief heats up as a new competitor comes forward; Callie must reveal a big secret; Derek treats a patient close to him; Alex continues his work with Jane Doe.
S03, E19 (First Aired:
George meets his new father-in-law; Alex helps Jane Doe determine how the world will see her; the hospital board begins interviewing candidates for the chief position; Izzie wrestles with a startling revelation.
S03, E20 (First Aired:
Izzie faces her past and finds comfort in George; Alex has an attachment to Jane Doe; Meredith and Derek question their status; Cristina resolves to fight for her relationship with Burke.
S03, E21 (First Aired:
The attendings are extra-attentive to a patient, who is the chairman of the hospital board; Cristina helps Burke plan the wedding.
S03, E24 (First Aired:
The interns take their first-year medical exams; the residents attend to three injured mountain-climbers; Callie's suspicions of George and Izzie grow; Cristina struggles to write her wedding vows.
S03, E25 (First Aired:
Cristina and Burke's wedding day arrives; the interns get their exam results; the chief's successor; Callie and George make a decision about their relationship.
S04, E01 (First Aired:
Cristina, back from her honeymoon trip, searches in vain for Burke; Meredith, Cristina, Izzie and Alex spend their first day as residents with their own groups of interns.
S04, E02 (First Aired:
The residents and interns treat the victims of a massive explosion at an apartment building; Mama Burke returns to collect her son's things; Lexie tries to have a heart-to-heart with unwilling Meredith.
S04, E03 (First Aired:
George's skill level dazzles the new interns; Meredith halfheartedly helps Lexie with her first emergency patient.
S04, E04 (First Aired:
The chief's wife rushes their niece to Seattle Grace; Izzie gets an unexpected reaction when she reveals her feelings about George to a mutual friend; Derek shows Cristina how to be a better teaching resident; Norman misdiagnoses a problem.
S04, E05 (First Aired:
Halloween is full of surprises for the doctors of Seattle Grace; Alex receives an unexpected visit from a former patient; Meredith thinks her mother's ashes are haunting her; a surgeon Cristina admires snubs her.
S04, E06 (First Aired:
The chief has a gentlemen's evening with his fellow surgeons; Cristina and Izzie find themselves competing for the same surgeries and the favor of the doctors performing them; Meredith tends to the survivor of a sky-diving accident.
S04, E07 (First Aired:
George and Izzie test their romantic chemistry; Derek asks for more than a physical connection with Meredith; Mark develops a crush on a fellow surgeon; Callie finds her role as chief resident jeopardized.
S04, E08 (First Aired:
Teenagers fill the ER after a school-bus crash; Bailey treats a patient who was her high-school crush; Derek goes on a date with a fellow doctor; Thatcher enters the ER looking for Meredith.
S04, E09 (First Aired:
An ambulance crash endangers the lives of the paramedics involved; Bailey treats a patient who refuses her help; Ava returns for Alex and meets his other girlfriend.
S04, E10 (First Aired:
Meredith furiously works to save the life of a paramedic trapped in an ambulance; Lexie holds a patient's life in her hands; Derek must rely on a nurse's help to save a patient; Bailey struggles to balance her personal life with work.
S04, E11 (First Aired:
Bailey's family faces a medical trauma just as her marriage falls apart; George's mother makes a surprise visit; a faith healer challenges Erica and Alex's belief in traditional medicine; Derek must deal with the aftermath of his kiss with Rose.
S04, E12 (First Aired:
Six weeks after Derek and Meredith ended their relationship, Meredith, Alex, Izzie and Cristina compete in a surgical contest, with Bailey serving as judge; George and Lexie adjust to their new, squalid apartment; Callie finds a friend in Erica.
S04, E13 (First Aired:
Addison returns to Seattle Grace to perform an operation and is surprised by all the changes in the lives of her former co-workers; Derek and Meredith's clinical trial has its first patient; Rebecca returns with shocking news for Alex.
S04, E14 (First Aired:
The nurses' complaints about Mark Sloan's trysts result in a date-and-tell policy; Cristina is forced to face her feelings for Burke; Meredith and Derek admit a veteran into their clinical trial.
S04, E15 (First Aired:
Dr. Wyatt refuses to let Meredith give up on therapy; Alex learns the truth about Rebecca's medical condition; the chief insists Erica perform a risky surgery on his mentor.