Story : Get to know long-time ShondaLand actress Caterina Scorsone. From her days on "Private Practice" to joining the cast of "Grey's Anatomy," Caterina has fabulously portrayed Dr. Amelia Shepherd, little sister of Dr. Derek Shepherd. Find out how she came to the role, what it is like to be a series regular on two of Shonda's shows, and what a typical day on set is like for her.