Meredith must save Thatcher’s life; Izzie empathizes with a tumor-riddled patient; annoyed with Cristina's competitive zeal, Mark tricks her into assisting on an odd surgery.
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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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You don’t know what you got until it's gone. Take living for example. Sure you catch your girlfriend making out with a tattooed drug dealer at a party but is that any reason to become the living dead?
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