"Blue Bloods" actress Bridget Moynahan reveals how she relates to her character Erin Reagan, an assistant district attorney in the hit TV show. Moynahan, like Erin, comes from an Irish Catholic family and has experience being a single mom. Although she admits she's not as uptight as Erin, Moynahan appreciates the law and believes she would make a good lawyer if it wasn't for the demanding education. With the show entering its 13th season, Moynahan expresses gratitude for being part of such a long-running series.