When it comes to the Reagan family tree, the branches of Blue Bloods stretch far and wide.

So, it can be a challenge to untie the family ties. Fear not, because we’re breaking down everything you need to know about the characters on CBS’ long-running favorite. Scroll down for a closer look at the expansive ensemble.

This is an excerpt from the Blue Bloods: The Special Farewell issue of TV Guide Magazine. For a look back at the long-running series and more information about the final episodes, pick up a copy of the issue, which is available on newsstands and online at BlueBloods2024.com.

The first time we met Tom Selleck’s New York City Police Commissioner, Francis Xavier Reagan, he was donning his uniform in the opening episode of Blue Bloods . Once suited up, with bars and a shield on his coattails, Frank presented an image of strength and success. But then he paused, his stoic gaze warming as he shifted from his own professional reflection in the mirror to a series of family photos on his dresser. There he was, smiling and casual in khakis, surrounded by family members of all ages. The scene immediately told us that this patriarch was balancing professional power with family care, all the while juggling the responsibilities of both.