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What to Watch on Tuesday: A nation at risk in the season finale of ‘Rizzoli & Isles’

Angie Harmon and Lee Thompson Young star in “Rizzoli & Isles.”
Angie Harmon and Lee Thompson Young star in “Rizzoli & Isles.” Jennifer Rose Clasen/TNT

Rizzoli & Isles (9pm, TNT) - In the Season 4 finale, a senator’s daughter is murdered, leading to an investigation that could put national security at risk. Elsewhere, Tommy falls back into old habits, stirring up tension with Frankie. And finally, Jane reveals some stunning news.

Also on tonight . . .

NCIS (8pm, CBS) - A bomb explodes in the dressing room at a military charity concert. The NCIS team investigate to determine whether the target was a washed-up 80s rocker or if the bomb was part of a larger scheme.

About a Boy (9pm, NBC) - Marcus asks Will for advice on how to get invited to a girl’s birthday party.

Brooklyn Nine-Nine (9:30pm, Fox) - Jake uses his weekend off to crack a cold case, with Terry’s help. Meanwhile, Amy plans romantic getaway with Teddy, and Boyle learns a secret from Gina and Rosa.

Justified (10pm, FX) - Raylan and Boyd collide while hunting for Dewey Crowe.