Plot summary
Rizzoli and Isles are on the case of a law student who was killed and dumped into a trash bin. Maura has found the identity of her biological mother, Dr. Hope Martin ( Sharon Lawrence ), but doesn't want to tell that she is her daughter, since Hope was told Maura died at birth. But when Maura is in need of a technique that Dr. Martin developed for fingerprinting corpses, Jane calls her in to help. Angela gets into politics when she starts supporting a new candidate for mayor, Tom MacGregor, Jr., who helps school lunches.
Credits
Adapted from Wikipedia contributors, List of Rizzoli & Isles episodes. HTML formatting and reference markers removed.