Of course, who knows what that means. Whether robot or body armor, we have no way of knowing its relation to the alien intelligence, assuming that the colonization has been done by aliens. All we know at this point is that they, whoever they may be, apparently have a base on the Moon (we saw that last week). Some options are: (a) the invaders are robots, or cyborgs of some sort, (b) the robots are weapons that the aliens are controlling, (c) the robots are controlled by humans of some sort, who have taken over LA, etc, or (d) there's a human of some sort inside the glimpse of what we saw, which is body armor. (Maybe they're Nazis of some sort, based on the art they're collecting - calling The Man in the High Castle.)
Meanwhile, it looks as if Beau is off the show, at least for the rest of this season, which ends next week. He's taking the tunnel to the outside and that cabin in the mountain, which Will wanted for Katie and the kids. On the other hand, Beau could well turn around and be back next week.
The argument between Katie and Will, with Katie apparently winning, was well staged, well motivated, and well played. Though, come to think of it, I'm not sure I believe that Katie would've missed the chance to find their son, however traumatized she was by the sight of her friend and sons hanging there labelled traitors.
As I've been saying all season, the show would do better to reveal a little more a little sooner. On the other hand, it's this lack of information which most has me primed for the season finale next week, and what it may reveal.
See also Colony 1.1: Aliens with Potential ... 1.2: Compelling ... 1.5: Questions ... 1.6: The Provost ... Colony 1.7: Broussard ... Colony 1.8: Moon Base and Transit Zones
not exactly aliens, but strange enough ... The Silk Code