Rizzoli and Isles Season 3 SPOILERS

"As Rizzoli & Isles' second season came to an end, a deep wedge was driven between the two friends when Jane shot Maura's biological father, gangster Paddy Doyle (guest star John Doman). He had shown up unexpectedly at a secret undercover operation to protect Maura from a deadly assailant, but the scene quickly got out of control, forcing Jane to shoot Paddy. The aftermath strains Jane and Maura's relationship as they try to understand and justify their reactions. When the third season opens, they are taken by surprise by an internal affairs investigation, pushing their friendship even closer to the breaking point.

Ever the professionals, Jane and Maura will work hard to set aside their differences as they investigate a number of complex and troublesome crimes. Among their cases are the murder of a female graduate student, whose strangled body is found hidden in tunnels under her university; a killer with a bizarre doll fetish who hunts women on public transportation, then leaves their bodies posed on benches; and the stabbing of two young homeless veterans who survived Afghanistan only to be brutally murdered in an alley. On the home front, Jane's meddling mother, Angela (Lorraine Bracco), is determined to play matchmaker. And Maura's life gets more complicated as she searches for - and uncovers - the truth about her biological mother (guest star Sharon Lawrence)."

Source: TNT Newsroom