Bio: The Brotherhood was basically the mafia. They were a crime syndicate whose leader had grown tired of planning simple acts of theft, which he deemed inefficient and unprofitable. One of their ranks, Brother Carlos, proposed a much safer operation. He had heard of a sunken treasure at the bottom of a lake in Mexico, which only needed a scientist's prowess to extract. Thus they drugged the Second Doctor and pressed him into service to discover a way to blast through the encrusted lake bed without damaging the treasure below.