CBS has found the second star for its upcoming drama Boston Blue.
Sonequa Martin-Green will play a lead role in the Blue Bloods spinoff opposite Donnie Wahlberg, who is reprising his role as Danny Reagan from the long-running series that ended in December 2024. Martin-Green (Star Trek: Discovery) will play Lena Peters, a Boston police detective who becomes Danny’s partner as he moves to a new city. Like Danny, Lena is the eldest child in a prominent law enforcement family.
CBS placed a straight-to-series order for Boston Blue in February, calling it a “universe extension” of Blue Bloods. While it’s set in the same world as Blue Bloods, it has a new creative team: Brandon Sonnier and Brandon Margolis (The Blacklist, Alert: Missing Persons Unit) will serve as showrunners and executive produce with Jerry Bruckheimer and KristieAnne Reed of Jerry Bruckheimer Television and Wahlberg. (Bruckheimer’s company wasn’t involved in the original series.)
Boston Blue is one of four first-year dramas on CBS’ schedule for 2025-26, along with FBI spinoff CIA, Fire Country offshoot Sheriff Country and Y: Marshals, a Yellowstone spinoff featuring Luke Grimes reprising his role as Kayce Dutton.
In addition to Star Trek: Discovery, Martin-Green was a regular on The Walking Dead for several seasons. Her credits also include recurring parts on Once Upon a Time and The Good Wife and the feature film My Dead Friend Zoe.