Grey’s Anatomy is celebrating 20 years on the air this year, and every fan remembers the scene when Dr. Addison Shepherd (Kate Walsh) set foot inside Seattle Grace and turned Meredith (Ellen Pompeo) ...

Throughout its 21 seasons, Grey's Anatomy has side-stepped some of the confines that come with medical dramas and, instead, it has embraced its soap opera quality, giving it the space to experiment ...