Ramon's obsession with finding Oscar's killer has him putting his career at risk, and Dexter does a masterful job manipulating Ramon and keeping him off balance; Internal Affairs leans harder on Deb to dig up some dirt on Quinn, but she "won't be a rat." Also, Rita and Dexter decide to tell the children about her "condition," and Angel's quest for companionship nearly gets him in hot water. ~ Ray Stackhouse, Rovi