Here In the Studio  we continue our exclusive classic rock interviews looking at the full history of all-American band the Doobie Brothers as they prepare to be inducted into the Rock and Roll Hall of Fame next month; through their second era with one of their lead singer/ songwriters, Tom Johnston, leaving due to illness, and unknown background singer/ songwriter Michael McDonald filling the considerable breach. Pat Simmons joins McDonald and Johnston the week of November 2. Redbeard