Plot summary
Two people return, and neither is who they originally appeared to be. Riley, the drug dealer (Ep 3.8) turns out to be an undercover detective from the drug unit, who has gotten the promotion Frankie was hoping for. Dennis, the man Jane and Maura revived in the morgue (Ep 3.3) has returned after dumping Maura three months before after some hot and heavy dating. The latest victim of a serial killer turns up encased in plaster as a new statue in the fountain at the art museum. Lydia goes into labor in the station coffee shop.
Credits
Adapted from Wikipedia contributors, List of Rizzoli & Isles episodes. HTML formatting and reference markers removed.