Bob Stewart, the prolific creator and producer of some of the biggest game shows in TV history, died Friday of natural causes. He was 91. Working at first for Mark Goodson and then for his own Bob Stewart Productions, Stewart created such popular game shows as The Price Is Right, To Tell The Truth and the various Pyramid games. The New $25,000 Pyramid earned Stewart nine Daytime Emmys for best game show. It was hosted by Dick Clark, who died April 18. Other titles Stewart produced include Password, Three On A Match, You’re Putting Me On and Jackpot. One quality of Stewart-created shows was their mix of celebrities and regular folk. Betty White was a frequent guest on his shows and, according to the Television Academy, often joined Stewart in playing poker. In 2009, he was inducted into the Academy’s Hall of Fame.