When Boston Blue returned from its midseason break, Danny Reagan (Donnie Wahlberg) made a commitment to the Boston P.D. and traded his NYPD shield for a Boston PD badge, so tonight, he begins his new career in a special holiday episode.
Is Boston Blue on tonight?
You betcha! And it’s a special holiday episode, “St. Patrick’s Day.” In it, Danny, Sarah (Maggie Lawson) and Lena (Sonequa Martin-Green) race to stop a looming threat on St. Patrick’s Day. Meanwhile, homesickness sparks a family gathering, and Lena’s personal life takes a hopeful turn.
What time does Boston Blue come on?
You can watch the latest episode of Boston Blue on Fridays at 10 p.m. ET/PT.
How to watch Boston Blue
New episodes of Boston Blue air Fridays on CBS, and then stream the following day on Paramount+.
What other storylines are currently in the works on Boston Blue?

Boston Blue will be taking a three-week hiatus as basketball takes precedence and CBS airs “March Madness.” But when the series returns with new episodes on Friday, April 3, Danny will get a visit from his grandfather when Len Cariou guest stars as Henry Reagan, making the third Blue Bloods reunion of the season. The 2026 Men’s March Madness begins with Selection Sunday on March 15, followed by games from March 17 to April 6.