If you've ever wondered what happened to Dr. Gregory Pratt on the already iconic medical series ER, here's the answer: he died, and his death was tragic. The character portrayed by Mekhi Phifer ...

RELATED: This Snack Makes Mehcad Brooks “Fail” At His Law & Order Set Goals Mekhi Phifer — who played Dr. Greg Pratt on ER — will guest star on the episode, once again sharing screen time ...