Episode: 3×24 (Season 3 Episode 24)
Name: Testing 1-2-3
Originally Aired: May. 10, 2007
Plot: The interns face one of their biggest challenges yet — their first-year medical exams. Meanwhile, the interns must tend to three injured mountain climbers. Elsewhere, Callie becomes increasingly suspicious of George and Izzie and Cristina has trouble writing her vows.
