Joe is being blackmailed. Someone tells Mike about Joe and Ginny. Joey catches a murderer of a young Russian immigrant mother. Paul makes a delivery to a late night poker game. He stays to play, losing his job and winning $500 that his opponents cannot pay him. Mike wants to bring a foster kid he recently met, home, but Erin is against it. Erin feels like she doesn't want to be like Mary, so she decides she wants to go back to school. Mary talks to a priest.