On 'Blue Bloods,' Bridget Moynahan plays Erin Raegen-Boyle, an assistant New York District Attorney in a family of cops. She stopped by 'The Early Show' (weekdays, syndicated on CBS) to talk about how the show's grown in its second season, and also discussed the charity work she does with the Paul Newman-founded organization The Hole in the Wall Gang.

Moynahan is pleased with the direction 'Blue Bloods' has taken in its sophomore season, which she said has better balanced the show's different elements. "We all have so many different layers, and I think this year they've been able to balance the procedural with the family and the individual dimensions a lot better," she explained.

The conversation then turned to volunteer work Moynihan does with a charity founded by the late Paul Newman called The Hole in the Wall Gang. The organization serves 20,000 kids who have cancer, sickle cell anemia and other serious illnesses, and Moynahan explained her experience lending a helping hand. "There was just a wide range of kids who were going through so many challenges in their own life, and then they were pushing themselves and each other even farther. So you just kind of jump in and become part of the energy and the vibe."