This program aired on WOI-TV in Ames, Iowa, on October 8, 1974. It began after the 10:00 news, and lasted over two hours.
Betty Lou Varnum, host of 'Dimension Five.' She is also remembered for other work in television in central Iowa, including "The Magic Window," a children's program begun in the 1950s.
Betty Lou Varnum page at Wikipedia
"The Magic Window," longest running children's television program in American history.