Grey’s Anatomy Season 7 Episode 5 (Grey’s Anatomy s07e05) with title “Almost Grown” aired on Thursday, October 21st 2010 at 09:00 pm via ABC Network.
Here is summary for Grey’s Anatomy Season 7 Episode 5 :

As part of their training, the Chief puts Seattle Grace’s residents, including Meredith, Cristina, April and Jackson, in charge; meanwhile, Derek, Callie, Owen and the other attending surgeons compete for a million-dollar grant