Who played Willma Dearing in Buck Rogers the 24th Century tv show?

The character "Wilma Deering" doesn't exist in the "Buck Rogers in the 25th Century" TV series. It's likely you're thinking of "Dr. Huer" (also spelled "Huer"), played by Erin Gray. She was the main female character in the show, a strong, independent, and intelligent woman who often found herself in danger alongside Buck Rogers.