Blue Bloods fans were delighted when Sonequa Martin-Green was cast in the show’s offshoot series, Boston Blue. The actress will be starring alongside franchise favorite Donnie Wahlberg in the new show.

Sonequa Martin-Green is trading in her Star Trek badge for a police badge as she joins CBS’ Blue Bloods spinoff, Boston Blue.

Martin-Green will star opposite Donnie Wahlberg in the new series from writers Brandon Sonnier & Brandon Margolis ( S.W.A.T. ), Wahlberg will reprise his role as NYPD Detective Danny Reagan as he takes a position with Boston PD. He, together with Martin-Green, revealed that she was joining the fall show at a press conference Wednesday at Paramount.