Being able to wipe minds and imprint them with new programming, to turn random people and even your enemies into soldiers who fight for you is a dream. And Boyd was certainly right in this episode: if such technology is ever developed it can’t be uninvented, and it will be used.
And thus we understand the importance of Caroline/Echo, her ability to resist imprinting and resurface as a person and remember, and eventually develop what could be called an immunity to it. On the one hand, that’s precisely what those who wish to win a war fought with such technology will need, since sooner or later your enemies will have it too and will use it against you, and you will need to be able to find a way of protecting yourself. On the other hand, you want to find a way of preventing your opponents from developing such an immunity – after all, it is no good imprinting an enemy to become an assassin, and finding that instead you’ve just given an assassin’s skills to someone who is still your enemy.
And so Dollhouse is bringing us to an exciting finale, and did it in a way that let us explore the notion of the teachnology and more mundane uses for it, before leading us down the dark path that could eventually lead to the “thought-pocalypse.”