Sasha Alexander and Enver Gjokaj Sasha Alexander and Enver Gjokaj

Heartache is in the air on Rizzoli & Isles.

As we previously reported, Maura (Sasha Alexander) and Jack (Enver Gjokaj) will break up this season, but this will be not be as swift — or as deadly — as the demise of Maura's past relationships. "Every person she's tried to date has tried to kill her!" executive producer Jan Nash tells with a laugh. "We wanted to give her somebody who seemed great, who seemed like he was right. The breakup is not a function of his inability or failures to be in a relationship. The breakup is a function of the circumstances that life brings you. It just feels sad. There's no other way to describe it."

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In reality, the split is due to Gjokaj's series regular role on Agent Carter. But instead of making Jack a heard-but-not-seen beau, Nash opted to use the breakup to embolden Maura and Jane's friendship. "The inevitability and the tragedy of that will then be a thing that Maura has to get through and Jane will help her," she says. "It's much easier to get over, like, 'Oh, I really liked him, but he was a serial killer!' As weird as that sounds! It's much harder to get over, 'I really liked him and we can't be together.'"

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