Callie and Derek collaborate on a brain mapping project.
Episode rating
Cast of episode
- 72
- 14
- 6
- 3
- 2
- 1
- 1
- Dr. Alex Karev
- Dr. Derek Shepherd
- Dr. Meredith Grey
- Dr. Cristina Yang
- Dr. Callie Torres
- Dr. Jo Wilson
- Dr. Arizona Robbins
- Dr. Leah Murphy
- Dr. April Kepner
- Dr. Jackson Avery
- Dr. Shane Ross
- Dr. Miranda Bailey
- Dr. Richard Webber
- Dr. Owen Hunt
- Dr. Stephanie Edwards
- Jimmy Evans
- Joyce Bosco
- Ben Bosco
- Dr. Emma Marling
- Mickey Wenschler
- Dr. Knox
- Bartender
- Intern
- Surgeon
- Intern