Tainted Obligation
| Episode Number | 4 |
|---|---|
| Season | 6 |
| Aired | 2009-10-08 |
| Overview | When Meredith and Lexie's father, Thatcher, returns to the hospital with a failed liver, it's up to Meredith to save his life. Meanwhile, Izzie empathizes with a patient riddled with tumors, as Mark, annoyed with Cristina's competitive zeal, tricks her into assisting on an unusual surgery. |
| Runtime | 43 minutes |
| Absolute Number | 106 |
| Finale Type |