Sasha Alexander and Angie Harmon Sasha Alexander and Angie Harmon

When Rizzoli & Isles returns for Season 2 (Monday at 10/9c), the TNT cop drama picks up just a few months after the harrowing hostage situation in the precinct, which ended with Jane (Angie Harmon) taking a bullet to the gut. The sophomore season will see the homicide detective struggling to get emotionally grounded, while desperately trying to prove she's ready to get back in the field.

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On top of that, Jane and Maura (Sasha Alexander) will be dealing with the return of family members, new love interests and secrets that may cause a rift between our favorite TV duo. Check out what's in store for Season 2:

Jane's struggles: Getting shot on the job is tough to come back from, but for Jane Rizzoli, it's the sympathy that really gets to her this season. "Jane bounces back pretty quickly," Harmon says. "Jane is Boston Homicide's own private Rottweiler, and she's proud to be that. But this season is more about who she is emotionally and the cracks in her armor." Maura will help Jane get back into fighting shape, even if it calls for tough love. "She's in tune with the fact that Jane is struggling emotionally more than even physically anymore," Alexander says. 

Maura's mother: Jane's mother, Angela (Lorraine Bracco), moves in with Maura this season after a nasty divorce, but it's the introduction of Maura's adoptive mother, Constance (Jacqueline Bisset), that will really change her. "Maura has this light side, but then all of the sudden, when we start learning about her family, there's a whole kind of dark side to her," Alexander says. "It's an awkward relationship, because you see how we, as adults, behave around our parents sometimes; how they can bring out and trigger things in us." Constance will also shine new light on the polar-opposite upbringings of our leading ladies.

Exclusive: Jacqueline Bisset joins Rizzoli & Isles for multi-episode arc

Jane's brother: Frankie Jr. (Jordan Bridges), who survived the shootout in the finale, is trying to move up in the ranks this season, hoping to join Jane's homicide unit as a detective. "She's going to help Frankie as much as she can, but she also isn't going to because the more that you help him, the more he's not going to learn," Harmon says. "But also, Frankie is full of surprises. It's not like he's this inept idiot that can't do anything. He has some of those Rizzoli skills as well. So it's more about surprising her and the audience."

Jane's other brother: Jane's mysterious and as-yet-unseen younger brother Tommy (Colin Egglesfield) is finally out of prison and will make his way back home this season — which causes new stress for Jane. "He's not exactly the family's best accomplishment," Harmon says. Maura, however, will have a slightly different reaction to his return. "She has an interest in Jane's younger brother," Alexander says. "They've become friends and there's a connection there that is unusual and it brings up, obviously, what would it be like to have your best friend maybe go out with your brother?"

Maura's love life: Though we find Maura in the throes of a relationship with Jane's doctor when the show returns, there's another man who has her heart. "He's the love her life," Alexander says of the ongoing relationship with a doctor who works in the Third World, who will be introduced later this season. "He leads a life that is not one that she can follow, so when they do come together, it's instantaneous passion and a connection that she can't really share with anyone else. She doesn't want to tell Jane about it, so she goes out of her way to hide this person because she knows that he's going to be gone again soon."

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Jane and Maura's relationship: Keeping secrets, like Maura's on-again, off-again lover, will cause strife in their friendship. "Jane comes to the realization that she's maybe misjudged her relationship with Maura," Harmon says. "She's always thought she could be herself and be personal around Maura, and the way Maura is acting is proving that to be untrue."

Jane's love life: In the season premiere, we'll meet Casey Jones (Chris Vance), a military man who has known Jane for years, but has been away serving his country. Immediately, sparks fly, bringing out a new side of the stoic detective. "You just get a glimpse into what kind of man it is that's going to keep our little Janie's attention," Harmon says. "You see Jane has grown up to be in Homicide Unit and he grew up to be a lieutenant colonel, but they are still kind of the same person."

Rizzoli & Isles returns Monday at 10/9c on TNT.