Boston Blue expands the Blue Bloods universe with a full slate of new characters alongside familiar Reagan family faces. Below is a complete, source-driven breakdown of the Boston Blue cast with every proper noun, date, number, role, and quote available in the provided reporting — plus concrete details on when and where to watch the Boston Blue TV show .

Release date, time & where to watch

Premiere: Friday, October 17, 2025, at 10 p.m. ET on CBS, with streaming on Paramount+ . The network lists the pilot, “Faith and Family” , as a 43-minute episode rated TV-14 (V, L) , and notes “NEW EPISODES FRIDAYS 10/9c.”

Entertainment Weekly also states the weekly slot: “ Boston Blue airs Fridays at 10 p.m. ET on CBS,” with Paramount+ Premium streaming live/on-dem

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