My husband and I devour television shows on DVD. Right now we're working on the third and final season of
Veronica Mars, but not too long ago we finished Season 3 of
Star Trek: the Next Generation. I grew up on TNG. My parents had Starfleet uniforms, and my twin brothers dressed as borg one year for Halloween. (I don't know how I dodged the cosplay bullet, but I did. I didn't really mean to. That's dumb luck for you.)
So when I saw this picture in the final episode of the season (
"The Best of Both Worlds, Part 1"), I immediately wanted to figure out how to knit it. But I think it might just be one of those things I do just to sock it away for any future (and I mean fuuuuuture) children-of-my-own.

It's definitely got to have earflaps and some sort of snap beneath the chin, and the tubing can be done with i-cord. The "brim", I'm not so sure about, but I'm leaning toward something like ribbing that's picked up/continued in such a way to give it a layered look.
As for the chest implant? Totally something you can button on a shirt and then hook pacifiers to. Clearly. Isn't that what all borg babies do?