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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When the hospital lab tech, Isaac, 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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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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When a burn victim unexpectedly dies in the E.R., all the Mercy West and Seattle Grace residents must defend their actions in hopes of saving their jobs.
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Seattle Grace: On Call, Part 1
