Magoo's, a local hangout frequented by the ER staffers, is the scene of a bloody holdup, in which three people are killed and one seriously injured. As Chen (Ming-Na) pieces together a sketchy description of one of the likely perps, her African-American colleagues Gallant (Sharif Atkins) and Pratt (Mekhi Phifer) are picked up on suspicion and subjected to harsh treatment by a pair of white cops who refuse to check out the doctors' alibis or credentials. The usually mild-mannered Gallant is more angered by this harassment than the cynical Pratt -- but both doctors relish the opportunity to serve up a delicious comeuppance to one of the cops. And elsewhere, Carter (Noah Wyle) really, really wants to pop the question to Abby (Maura Tierney)...but.... ~ Hal Erickson, Rovi