Gloria Henry, best known for her role as family matriarch Alice Mitchell in the hit '50s and '60s sitcom Dennis the Menace, has died. She was 98. "She's flying now, free of her body," Ellwood wrote alongside a photo of Henry standing in front of a mural featuring outspread angel wings in Los Angeles. "She left on a countdown 4 3 2 1 @ 3:40pm. She was such an incredible woman in so many ways.