Ray DiSalvo, Bobby Simone's old friend, reaches out to Russell from prison, with information concerning Don Kirkendall. While Medavoy is tied up in court and Sorenson is meeting with both DiSalvo and Denby, Sipowicz and Jones team up to search for a possible serial-killer, who's targeting taxi drivers.
Sipowicz finally gets the results from son Theo's blood tests and the news affects his whole day.