Boston's Finest Season Finale - "Boston's Finest" - Wednesday, April 17, at 9 p.m. (ET/PT)

Jenn Penton, one of the department's best patrol officers, is called upon day after day to solve one problem after another. But life doesn't always present issues that can be solved in short order. Her twin sister has been battling addiction for years. Now, after a few recent setbacks, she has reached out to Jenn for help - perhaps for the last time. Meanwhile on the fugitive unit, Winston DeLeon and company are pursuing a rape suspect from a case dating back to 1992. And Manny Canuto and "D" Araujo of the gang unit find themselves assisting in another SWAT raid, continuing their unrelenting quest to get as many guns off the streets as possible.