Thomas Mark Harmon 1951 - Mark Harmon was born into a devout but tough Catholic home. His father was football star and famous commentator Tom Harmon. His mother was a B movie actress. He was a star quarterback for UCLA, but instead of a football career, eventually drifted into acting. Is best known for his current long-time role on "NCIS". Unknown if he is still practicing the Faith, but both his sons (with actress wife Pam Dawber) graduated from a Catholic high school.