Overview
Addison visits Seattle Grace because they need skills that only she has. Rebecca/Ava returns with news for Alex. Meredith and Derek's clinical trial experiences one or two developments.
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4 - 1A Change Is Gonna Come September 27, 2007 -
4 - 2Love/Addiction October 04, 2007 -
4 - 3Let the Truth Sting October 11, 2007 -
4 - 4The Heart of the Matter October 18, 2007 -
4 - 5Haunt You Every Day October 25, 2007 -
4 - 6Kung Fu Fighting November 01, 2007 -
4 - 7Physical Attraction, Chemical Reaction November 08, 2007 -
4 - 8Forever Young November 15, 2007 -
4 - 9Crash Into Me (1) November 22, 2007 -
4 - 10Crash Into Me (2) December 06, 2007 -
4 - 11Lay Your Hands on Me January 10, 2008 -
4 - 12Where The Wild Things Are April 24, 2008 -
4 - 13Piece of My Heart May 01, 2008 -
4 - 14The Becoming May 08, 2008 -
4 - 15Losing My Mind May 15, 2008 -
4 - 16Freedom (1) May 22, 2008 -
4 - 17Freedom (2) May 22, 2008