The CBS spinoff Boston Blue, which follows NYPD officer Danny Reagan (Donnie Wahlberg) as he starts anew in Boston after his son's near-death experience, has already brought back three Reagan family members—Erin, Henry, and Joe Hill. Yet the one cameo fans most anticipate remains elusive: Tom Selleck's Frank Reagan.. In a recent interview with Woman's World,star Sonequa Martin-Green revealed that discussions to bring Selleck on board have been ongoing for 'a long time,' though the writers are waitting for a story that meets the actor's high standards.

The Reagan Family Tally So Far: Erin, Henry, Joe Hill — But Not Frank

According to the same Woman's World report, the spinoff has already welcomed Reagan siblings Erin and Joe Hill, as well as the family patriarch Henry (Len Cariou). Frank Reagan, however, has been conspicuously absent—despite being refeenced often in dialogue. The Blue Bloods finale saw Frank retain his position as NYPD Commissioner, shutting down retirement rumors. That open-ended status makes his trip to Boston a logical narrative next step, especially now that Henry has already made the journey.

Sonequa Martin-Green's 'Long Time' Revelation: Story Before Stunts

Martin-Green, who plays Detective Lena Peters, told Woman's World that the production team has 'been talking about Mr. Selleck for a long time.' She emphasized that the actor is 'so adamant about the story, as he should be .' This suggests that any cameo will be more than a quick walk-on—it will carry emotional weight. The report also notes that a crossover episode between the New York and Boston police departments has been teased, which could provide the grand stage for Frank's arrival.

The Ratings Momentum That Could Seal the Deal for Selleck

Boston Blue has been a ratings success, securing its future and increasing the likelihood of a Selleck appearance. The show's strong performance also opens the door for other Blue Bloods characters, such as Eddie and Jamie Reagan, who now have a child of their own, to join the spinoff.. The combination of audience demand and network commitment creates a favorable environment for the long-negotiated cameo .

What the Blue Bloods Finale Left Open: A Commissioner's Unfinished Business

The Blue Bloods finale deliberately left Frank Reagan's career status ambiguous—he remains NYPD Commissioner, not retired. That narrative choice preserves the character's availability for future stories. as Woman's World reported, Frank has already been mentoned several times on Boston Blue, building anticipation. The key open question is whether Selleck will appear in season one or a potential season two, and what personal stakes will bring him to Boston to see his son Danny .