Cameron actually finally seems offended, and tells Charley he should go, as it's not safe for him to be around while she does this. She lights a flare and holds it above the T-888. Charley doesn't move. Cameron drops the flare in, and the T-888 lights up. Charley stares at Cameron a few more moments, and then walks away before the thermite melts his face. And since the point of the thermite is that it burns hot enough to destroy Terminators, shouldn't Cameron stand a little farther away from the fire?
In the year 2027, Derek is now in some sort of underground command bunker, getting nowhere with one of Connor's underlings, who says Connor doesn't have any friends and isn't talking to anybody. "Fine. I'll find him myself," threatens Derek. And that's when Derek sees Cameron, or a Terminator who looks just like her, in a blue jumpsuit. "Metal!" he yells, drawing his gun. Yeah, maybe an automatic pistol will work one of these times on a Terminator. Cameron calmly draws her weapon too, but Derek's shot is sent wild when he's tackled by the other soldier. "She's one of ours!" he says. Derek's stunned.
He's still not believing it later, either, after getting the explanation of how Terminators get reprogrammed, and he doesn't understand how the Terminators are allowed to just walk around like that. "It's Connor's show, and that's the way he wants it," is the (non)explanation. Derek's objection is mainly that all the machines do is kill. "Now they do it for us," says the other soldier.
Or do it to us: Later, Derek is resting, when he's awoken by the sound of gunfire. He runs out into the hall, where a Terminator is mowing down soldiers with automatic weapons fire. Derek fires off a few shots from his handgun, which is about as effective as a squirt gun, and then ducks for cover as the Terminator heads his way. Derek manages to trip up the Terminator, and then fires off a few more shots, which don't have any more effect at close range. "Do it! Kill me now, you son of a..." he yells, when in steps Cameron, who shoves the Terminator through a wall, and then takes care of it with -- I want to say a grenade launcher.
She turns to Derek. "Sometimes they go bad. No one knows why." Sometimes? How often does this happen? Derek, I think you may want to renew your objection to having the Terminators walking around. This time, make sure your objection is strenuous.
Sarah strides into the shed, presumably to give Cameron hell for disposing of the T-888 with the shed door wide open...oh, no, she demands to know what Cameron said to Charley. "I freak him the hell out," says Cameron. "I'll bet you do. I'll just bet," snaps Sarah. I'm confused; is Sarah pissed at Cameron because Charley's freaked out? Because I don't think that's Cameron's fault. I also think it's entirely understandable on Charley's part.