Boston Blue is about to face the wrath of Blue Bloods usweekly fans after breaking up a beloved couple. During the Friday, April 17, episode of the CBS series, Danny Reagan's (Donnie Wahlberg) girlfriend, Maria Baez (Marisa Ramirez), returned to help with a case. Their dynamic, however, was off and Maria later revealed that she was struggling with her mother's deteriorating mental health after a Parkinson's diagnosis. She surprised Danny - and viewers - by hitting pause on their relationship. "She's in a crisis.