Martinez would like to arrest Simon right away, because they know he's an alien double agent. That's a pretty good reason to arrest someone, in my opinion. Or at least a good reason to get him out of the Situation Room. However, Sterling wants to play it cagey. Instead of throwing Simon into a cell and doping him up with truth drugs and bringing in a wrecking crew to beat him up, he wants to "flush him out. Sooner rather than later." I don't quite see why he needs to be flushed out when he's standing right over there. But I guess Sterling's got a plan. I'm sure nothing will go wrong! Meanwhile, Simon is standing in the Situation Room watching those monitors I was complaining about. He's looking at the burnt corpses and fighting back tears. Sterling comes back in to tell him that NASA satellites are analyzing some electromagnetic pulses that could lead them to Sophia. Simon says he'll gather his men, and then he looks worried when Sterling says it could be "the killing blow."
Simon rushes out of the Situation Room and hurries down a hallway, bumping into the Chief of Staff along the way. Martinez, Sterling, and some security folks are watching his progress on some monitors. I guess somebody finally realized that the White House is honeycombed with security cameras. And those security folks (I only call them "goons" when they're shooting people) have probably been wondering when someone was going to ask about Simon's habit of ducking into darkened offices. Simon's about to make a call to Sophia when there's a buzzing in the room. He looks around and finds a phone taped to the underside of the desk. Weird! He answers it, of course, because what else are you going to do? Sure, you're an alien double agent in the White House who just saw a hundred of your people die, but hey, what's with this phone, right? That's something that would just bother you all day if you didn't pick it up. So he does, in fact, pick it up. And there's a voice on the other side that's going through a voice encoder. The voice tells Simon that he's been rumbled. I guess it's a good thing that the mysterious voice knew exactly what office Simon was going to duck into, as well as exactly when. That's the sort of attention to detail you want out of your anonymous benefactor.
Simon puts on an earpiece so he can be given specific instructions for getting out of the White House, and it's a little reminiscent of the time that Sophia sat on that subway train and got an earpiece. And it's a lot reminiscent of the scene in The Matrix where Neo is led through the office building by an omniscient voice that knows exactly when Neo should duck behind walls and stuff. Simon's led down through the kitchens as Sterling dispatches a couple of guys to go follow him. Suddenly, Simon is not visible on any of the monitors, and Martinez complains about it. He points out that there are hundreds of cameras, so Simon shouldn't be able to just vanish like that. I agree! But it doesn't really matter, because he's soon found again, running through a tunnel. He makes it to the surface streets and gets into a car that's waiting for him. The voice tells him that he'll have to change cars to a black SUV (naturally) but that he's basically escaped. It's a good thing there aren't any law enforcement officers within a few blocks of the White House, or it would be really easy to arrest Simon. I'm not sure exactly what would happen if the Washington Monument blew up, but I feel like that would be a bad time for someone to try to escape the area. However, I'm not in charge of this show. The mysterious voice says, "Be careful out there, Simon." "You too," he says. So! Simon's escaped. Good work, Sterling.