Cigarette companies are back on TV-in an anti-smoking campaign. A new spot for the California Department of Health Services uses footage from congressional hearings last April, when CEOs from Philip Morris, R.J. Reynolds Tobacco Co., American Tobacco Co. and Brown & Williamson Tobacco Corp. denied nicotine is addictive. "Do they think we're stupid?" the spot asks. This is the first work from Asher/Gould, Los Angeles, which won the business in May.