Best I can make it, it's all about sex. Just J's Star Trek Piper is sci-fi royalty as a memorable companion on Doctor Who. She has recently gotten way more sexual this season. The Gorn Movie Marquee Friday:
Turnaround, Part V What If
20 Sexiest Women In Sci-Fi
So you really can have the same person play the same basic role if not character and still register different levels of sexiness. Nichols is not your average sci-fi heroine. Whether you hit puberty in the 60s or last week, your first SF crush has a good chance of being on the list. Insurrection, but there are a lot of Trek women already and she became a victim of variety. It just goes to show you…you have to watch the quiet ones.