Bobby and Diane talk about making a long-term commitment to each other. At a murder scene a couple of bodies are found and Medavoy is disgusted by the amount of semen found on one of the corpses. One body belongs to a car salesman and the other to a prostitute. Simone and Sipowicz look into the car salesman's death. The other detectives look into the prostitute's death. While Andy seems to be fully recovered from his surgery, the results of a recent blood test are not entirely favorable and he is nervous about telling Sylvia. The MO of the suspected perp in the prostitute's murder is to buy used condoms from a prostitute and then mix the spent semen with his own to cover his crime. However, Medavoy gets tough and is clever with the perp during the interview. Meanwhile, the uniforms bring a man into Simone and Sipowicz. They can tie the man to their victim, but are convinced that the man's honest account of the event leading to the shooting is true. Realizing that the man wasn't capable