(written from a Production point of view)
Her first appearance, often attributed to Joan Johnson by the Star Trek Encyclopedia (4th ed., vol. 2, p. 547) and other sources, was as a Khan's elite female guard in "Space Seed". Her scene for this appearance was filmed on Thursday 22 December 1966 at Desilu Stage 10.
Johnson is perhaps best know for being one of the first women, during the late 1970s, to be a stunt coordinator on a major television series, Charlies Angels.
Most recently, she co-authored the book "The Stuntwoman", a semi-autobiographical account of her role as a whistleblower against sex discrimination in the Hollywood stunt business.