Mason McCulley

The residents try their hardest to impress surgical great Catherine Avery—who also happens to be Jackson’s mother—when she arrives at Seattle Grace to perform a groundbreaking transplant surgery; Arizona and Alex find their hands tied with a confidentiality issue when a familiar patient comes into the ER; meanwhile, a love-struck Teddy throws a dinner party for the couples.

Sheldon welcomes Missy to the world of atheism by encouraging her to question the Bible. Also, Meemaw is determined to catch George, Sr. in a lie; and Mary helps Pastor Jeff (series regular MATT HOBBY) search for a youth pastor.