12 Grey's Anatomy Episodes Where Sandra Oh Shone as Cristina Yang

Most might remember "Elevator Love Letter" as one of the best Meredith and Derek episodes where the latter proposes, but it also has a powerful subplot featuring Cristina. While they're sleeping one night, Owen chokes Cristina, which is a manifestation, we later find out, of his PTSD. The episode delicately and complexly addresses Owen's mental health while teasing out the nuances in Cristina's reaction after the incident.