Private Practice Season 4 Episode 5 (Private Practice s04e05) with title “In Or Out” aired on Thursday, October 21st 2010 at 10:00 pm via ABC Network.
Here is summary for Private Practice Season 4 Episode 5 :

Much to her displeasure, Addison is teamed with a new oncologist, Dr. Rodriguez, to treat a newborn baby with a malignant tumor; when Violet and Sheldon visit a prison in order to interview inmates who are up for parole