Season 6, Episode 4 Tainted Obligation
First Aired: October 8, 2009
Meredith must treat her father, Thatcher (Jeff Perry), who's suffering from liver failure; Izzie empathizes with a tumor-riddled patient; and Mark tricks Cristina into assisting on an unusual surgery because he's annoyed with her competitive nature. Irving Waller: Ralph Waite.
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- Premiered: March 27, 2005
- Rating: TV-14
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- Premise: The story revolves around five surgical interns and their supervisors, showing their personal and professional lives. (more)