- Ellen Pompeo (Meredith Grey)
- Chandra Wilson (Miranda Bailey)
- James Pickens Jr. (Richard Webber)
- Caterina Scorsone (Amelia Shepherd)
- Camilla Luddington (Jo Wilson)
- Kevin McKidd (Owen Hunt)
- Kim Raver (Teddy Altman)
- Jason George (Ben Warren)
- Chris Carmack (Atticus Lincoln)
- Anthony Hill (Winston Ndugu)
- Adelaide Kane (Jules Millin)
- Alexis Floyd (Simone Griffith)
- Niko Terho (Lucas Adams)
- Harry Shum Jr. (Benson 'Blue' Kwan)
- Trevor Jackson (Wes Bryant)
Grey's Anatomy — S3E24
Episode: Testing 1-2-3
Air Date: 2007-05-10
Runtime: 43 min
Overview
The interns finally take their first year medical exams, the biggest test of their careers, and one of them is ill-prepared. Callie grows more suspicious of George and Izzie. The doctors treat a patient named Dale. Three mountain climbers are treated. Cristina works on her vows. Adele wants Addison to keep a secret from Richard.