For two seasons, Will and Katie Bowman have been battling the RAPs in their own ways. Will tried doing it from the inside, while Katie favored the rebellion. This week they finally got to meet a RAP face to face (although camp leader MacGregor called it a 'Click').

“I’m still pissed at that guy for not letting us ask more questions,” Holloway joked to USA Network during this year's NBC Summer Press Day.

Still, Will and Katie did get to ask the RAP the basics of the invasion.

“I couldn’t believe how early it happened in the season,” Callies admitted. “I thought that kind of a thing would be a season finale. Then, all of a sudden, we read it’s episode three!”

RAPs don’t speak English, so to answer their questions, the RAP sampled their own voice and played it back for them.

“The way they set the scene up was really interesting and fun,” Holloway said. “We had to go in and do an ADR session and just repeat these kind of words. We were like, that’s strange and interesting. We knew what it was for but didn’t know how it would exactly work out. They made the RAP -- or Click -- speak in our voices back to us. So on the day, we’re filming and it’s your voice coming through this thing. It’s very strange. It was creepy and wonderful.”

“It was so creepy,” Callies added. “It was really creepy.”

Filming the scene, Holloway felt Will and Katie’s frustration, wanting to get some answers already!

“It puts you right where you need to be,” Holloway said. “What I found about that scene was it was all about patience. You just had to wait and listen for that thing and react. I love the director for taking that time, letting it be still.”

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Although they were cut short, Will and Katie did find out that the RAP claimed there was an even worse species coming for Earth. The RAPs say they’re only enslaving humanity to help them fight the mutual enemy. Callies isn’t quite buying it.

“There’s a big question of what you trust, right?” she said. “If I were held captive and somebody was threatening me, a very smart tactic would be to say, ‘I’m actually not your enemy. I’m defending you from somebody much worse who’s coming.’ So there’s what the RAP says and there’s whether or not we can believe it. I think it’s hard to really put your faith in a member of a species that’s been annihilating your entire planet. The critical piece of information that we do believe is that these are not the only extraterrestrials we have to worry about -- and that changes things a lot.”

It sounds somewhat familiar to the enemies Will and Katie already faced in the resistance. Even humans have been untrustworthy in the battle against RAPs.

“It’s about perspective,” Holloway said. “Again, who is good and who is bad? All this time, you had a clear enemy, the IGA, the New Order. They’re collaborating with this terrible enemy and then the arrival of another enemy makes you go, 'Wait a minute. Are they bad? Is the IGA bad people or are they the ultimately noble?' It poses that question to the audience. Until you know who is actually trying to annihilate the human race, then you don’t know the answer.”

Or, take Snyder, who’s tagging along with the Bowmans and they don’t know yet that he’s informing on them.

“The show does a really good job of presenting all of a Snyder’s reasons for collaborating with as much sympathy as possible,” Callies said. “As the season goes on, you hear him defend his choices really eloquently and convincingly, the same way that the leader of the Red Hand was defending her choices to engage in terrorism in the name of liberty. We’re starting then to see the same with the RAPs. We’ve done what we’ve done for our own reasons as well -- and those reasons are justifiable. So it just continues to muddy the waters even further.”

Meeting the RAPs also illustrated the problems with MacGregor’s camp. His unwillingness to let them talk is a symptom of the bigger problems with MacGregor.

“I think we come into it thinking this could be a safe haven," Holloway said. "And, more to the point, this could be the resistance we’ve been looking for. Not the crazy terrorists of the Red Hand, and not me and Broussard and Quayle in a basement somewhere -- but actually a real resistance. And then all of a sudden, what we end up with is this sort of crazy, fascist dictator who’s destroying our ability to get the intelligence that we need out of a need to keep himself in power, which sounds familiar.”

In real life, we may not be fighting aliens -- yet -- but the stars of Colony see how their show captures humans' nature to separate into factions, even between groups who agree on the same goals.

“Our show explores exactly these kinds of perspectives and how we instinctually polarize, even though we’re in the face of the same enemy,” Holloway said. “So we go to the resistance camp, thinking we found our people -- we should all be on the same side. There’s an obvious enemy and yet we polarize."

Tune in next week for more Colony, Wednesdays at 10/9c on USA!