Original sentence: The series was also noted for its closing theme song "I Have a Heart" (which debuted in season 2) written by American singer, pianist and songwriter Mort Shuman (who has lived in both the UK and France)
Edited sentence: The series was also best known for its closing theme song "I Have a Heart" (which debuted in season 2) written by American singer, pianist and songwriter Mort Shuman (who has lived in both the UK and France)