This is now closed. The actress below is Yvonne Craig, who starred as Batgirl on Batman, and as the green woman on Star Trek’s Whom Gods Destroy.
Like with the others, first person to guess who this actress is gets a coupon code for the 2018 Military SF StoryBundle. This is very limited now, since the bundle comes down in 3 days!
You can check out the bundle here. Onto the clues.
This actress was in a popular TV series in the 1960s and rode a purple motorcycle. She also was green for a science fiction TV series.
This photo was taken at DragonCon in 1997. The actress has since passed away (which is what I seem to be saying about a lot of these stars unfortunately).