"See One, Do One, Teach One", Hoyt and the apprentice are shown attending medical school with Jane. Jane shoots and kills the apprentice and throws a flare at Hoyt. Jane then shoots him in the hands and says, "We match." In the episode "Remember Me", Hoyt, dying of cancer, lures Jane and Maura into his hospital room with the assistance of a new apprentice, intending to kill Jane before he dies, but Jane manages to get the upper hand and stabs and kills Hoyt with a scalpel while saying, "I win." Despite his death, he continues to haunt Jane and the team, and he was mentioned in the next two seasons after his death. While dealing with the murders committed by Dennis Rockmond ("Melt My Heart of Stone"), Jane speculates that he may be an apprentice of Hoyt due to the ritualistic nature of his crimes, and "No One Mourns the Wicked" saw the team deal with a forensic pathologist and her son (conceived by her father's abuse) who were committing murders inspired by Hoyt. Sharon Lawrence as Dr. Hope Martin, Maura's biological mother, who was told by Paddy Doyle that Maura died as a baby. She is a noted medical doctor with another, much-younger daughter, Caitlin. Emilee Wallace as Cailin Martin, Hope's daughter and Maura's half-sister. Despite Caitlin's initial hostility, Maura later donated her kidney to Cailin to save her life. Alexandra Holden as Lydia Sparks, a ditzy young woman who is heavily pregnant when she is befriended by Angela. It is soon revealed that the child she is carrying is the child of either Angela's son Tommy or Angela's ex-husband Frank. Eventually the child is known as T.J., for "Tommy Junior", after a test confirms that Tommy is the father. Jaz Sinclair as Tasha Williams (season 5), a high school student who witnessed a shooting, saved by Jane from the shooter.. Production The untitled project was on TNT's development slate as early as March 2008. In October 2009, TNT placed a cast-contingent pilot order under the original title, Rizzoli. The pilot script was written by Janet Tamaro. Angie Harmon was the first actress cast, taking the title role of police detective Jane Rizzoli. Sasha Alexander won the role of medical examiner Dr. Maura Isles after auditioning with Harmon. Bruce McGill signed as Rizzoli's former partner, Sgt. Vince Korsak. Lee Thompson Young was cast as her new partner, Barry