Angie Harmon and Sasha Alexander are back in this chart-busting, suspenseful series as Jane Rizzoli, a tough-as-nails Boston police detective, and Maura Isles, a smart, impeccably dressed medical examiner from a privileged background. As Rizzoli & Isles continues for a fourth explosive season, Jane and Maura will investigate a number of complex and troublesome cases, including a deadly shooting at a community parade, the brutal killing of an overzealous journalism student and the pending murder trial of Maura's biological father, Paddy Doyle (guest star John Doman). Plus, Amaury Nolasco (Prison Break) guest stars as Lt. Detective Rafael Martinez, the newly appointed head of the Boston Police Department's drug unit, who has a conflicted professional past with Jane, forcing her to relive a painful experience. Guest stars this season also include Chris Vance, Sharon Lawrence and Colin Egglesfield.