Comedian Sid Caesar, one of early network TV's biggest stars, died Wednesday morning at his home in Beverly Hills. He was 91. Caesar didn't do smut, putdowns or smarmy remarks. Instead, he did skits: grown-up, gentle comedy for the whole family. In one skit, Caesar was the smarter-than-anyone German "professor." Carl Reiner played a movie executive with money problems. The professor's solution? Make a musical and get the greatest composer in the world. He is shocked to discover that his top choice won't be available. "Beethoven, dead? Ludwig is gone. This is a shock. Look at that, you don't pick up a paper a couple of days, you don't know what's going on." In another skit again with Reiner as the sidekick the professor was asked about the theory of flying. "What keeps the birds in the air?" he said. "Courage." i i hide captionGisele MacKenzie plays bride to Sid Caesar's German professor character, as G...