What a Difference a Day Makes
| Episode Number | 22 |
|---|---|
| Season | 5 |
| Aired | 2009-05-07 |
| Overview | As Meredith, Derek and all of their friends prepare for the big wedding, a group of college students, injured in a car crash as they were heading to their graduation ceremony, is admitted to the ER. Meanwhile, Izzie fears the worst when she begins experiencing familiar symptoms. |
| Runtime | 43 minutes |
| Absolute Number | 100 |
| Finale Type |