Hot on the heels of the series premiere, TNT is already rolling in the black gold that is their revival of Dallas. The series has been averaging about 6.9 million viewers in its first season this summer, and that’s after decades away from Southfork and the familiar characters from the classic series. Now with a larger family, the show is back with a vengeance and TNT has decided to keep it around for a second season with a 15-episode order just announced, slated to air sometime in 2013.  But that’s not all. TNT also brings back the female detective duo Rizzoli & Isles for a fourth season next year.  More details, including full press releases for both renewals, after the jump.

On the new TNT drama Rizzoli & Isles, Sasha Alexander plays Maura Isles, a Boston medical examiner who is usually more comfortable among the dead than the living. Her devotion to logic and science leads to her tendency to diagnose the people she meets, which makes for some socially awkward situations.

Despite their many differences, Isles and her best friend, Jane Rizzoli (Angie Harmon), are two strong, brilliant women who work together to solve some of Boston’s most complex cases. During an interview to promote the series premiere, actress Sasha Alexander talked about what made her want to return to series television and how much she enjoys working with co-star Angie Harmon. Check out what she had to say after the jump: