Final answer:
Akiva Goldsman is the producer connected with both the HBO series Big Love and the film adaptation of The Da Vinci Code directed by Ron Howard.
Step-by-step explanation:
The person who helped produce the HBO Series Big Love and scored a major international success by reteaming with director Ron Howard for the big-screen adaptation of Dan Brown's novel The Da Vinci Code is Akiva Goldsman. Goldsman is a well-known screenwriter, producer, and director in Hollywood. His involvement in Big Love as an executive producer and his role as a screenwriter for The Da Vinci Code showcase his versatile talents in the entertainment industry. The name of the person who helped produce the HBO Series Big Love and scored a major international success by reteaming with director Ron Howard for the big-screen adaptation of Dan Brown's novel The Da Vinci Code is Brian Grazer.