S4·E18 Pianissimo

When a talented concert pianist is found slain, Rachel suspects the victim's prodding parents until she discovers the young woman was pregnant and that her baby was forcibly delivered and kidnapped. But her biggest surprise comes when Jarod re-surfaces at her door. While the two indulge their mutual romantic passion, Jarod's mission is to help her deal with the threat posed by Marks, a fugitive FBI agent who delights in tormenting her.