In short, I don't think a controlled "Feminist Explosion" can block the light of the TV screen, if that light is really there in the first place. Feminist and anti-racist analysis of media is important because if entertainment is worth consuming, it's worth questioning: it reflects who we are and what we want. While I'm okay with handwaving, say, the occasional faster-than-light travel in science fiction, media treatment of people affects how viewers feel and think about others and about themselves. As http://thehathorlegacy.info says, popular media have the power to introduce new ideas to people. Cultures need to change, cultures are informed by their media, and media can help people change their thinking. I recommend that site if you're at all interested in good discussion about gender issues in media. I was recently reading a couple of posts there on How I Met Your Mother; any pleasure I might have lost in the episodes discussed was more than surpassed by the sense I'd learned something valuable about how I see these issues—and how popular culture views and shapes our feelings on them.

And yeah, without being fond of Astrid, I can still say her resurrection was an incredibly stupid move by the Doctor, and demeaning for her—did the resurrection restore her consciousness? Is she floating around for the rest of eternity, caught in the terror of the fall to her death, and unable to communicate with anyone? I hope not.