I love watching Grey's Anatomy. Have you seen it?
I sure have, I just love Meredith Grey, she is the best part of the show! 
She is nice! Do you remember the names of any other actors on the show?
Im not sure but I know that the series was designed originally to be racially diverse and even used color-blind casting. 
Really? I didn't know about the color-blind casting. Do you know when the show began?
Yea it premiered way back on March 27, 2005 on the network ABC.
Neat. Yes I remember it's been on for a long time. I think 15 seasons?
Yea it has 15 seasons its actually ABC's longest running series ever believe it or not. 
Wow! Its surpassed all the other shows in popularity too I assume! I need to buy the seasons on DVD!
Pompeo, first featured as an intern. The original cast consisted of nine star-billed actors: Pompeo, Sandra Oh, Katherine Heigl, Justin Chambers, T. R. Knight, Chandra Wilson, James Pickens Jr., Isaiah Washington and Patrick Dempsey. The cast has undergone major changes through the series' run, with many members leaving and being replaced by others. In its fifteenth season, the show has a large ensemble of eleven actors, including four characters from the original cast (Meredith Grey, Alex Karev, Miranda Bailey
"Holby City" for a two month guest stint. Of her return, she stated, "It's only for two months. I love the show and going back was so like coming home, like putting on your duvet – you just know you are home. But I know that I have to do other stuff. We are nomads, actors. I'm really honoured to go back in." Mo returns alongside Guy Self (John Michie) in the twentieth series episode "One of Us", broadcast