Tom Selleck once underlined the key difference between Jesse Stone and Blue Bloods‘ Frank Reagan, and where the line is for both characters. Prior to jumping on Blue Bloods, Selleck was busy playing the title role in the Jesse Stone TV movie series. Despite being played by Selleck, Stone and Frank Reagan are total opposites in many ways. Reagan is a religious family man who always upholds the law, whereas Stone is a nihilistic, alcoholic loner who essentially needs his job to function.

https://screenrant.com/jesse-stone-blue-bloods-tom-selleck-frank-reagan-different-op-ed/