i have actually, through cavan, i have got a lot of books -- through kevin, i have got a lot of booksd i've learned so much more about what the troops are going through, and my respect and appreciation for what they sort of -- how they dedicate their lives for our country. that has been difficult to really sort of -- as i opening as it is, and also in a beautiful way, very illuminating. tavis: tell me more about your character. >> my character, and owen hunt who was in iraq has brought me to this hospital and we used to serve together in iraq. i am a cardio thoracic surgeon. tavis: did you know what that was before you started playing this actor -- this character? >> i cannot even say it. [laughter] tavis: you were so it smooth about saying it. >> she is a heart doctor. i actually got to go out and observe an open heart surgery, a real one. tavis: did it freak you out? >> yes. i was not in a gallery, watching down. i was literally standing over the patient's head and looking into the heart. there are things that i get to research and see that i never -- i think when you are a patient,