Ivy Bethune

Ivy Bethune (1 June 1918 – 19 July 2019) was an American actress. She played Duana in the "" first season episode "When The Bough Breaks." Bethune also played Ma Peabody in the 1985 movie "Back to the Future". 
At the time of her death, Bethune was the second-oldest living female "Star Trek" performer, after Marsha Hunt. She was the third oldest overall "Star Trek" performer after Hunt and Norman Lloyd. She was the sixth "Star Trek" performer to reach the age of 100.
She died of natural causes in Woodland Hills, California.