It’s when we got inside the building, crashing through windows dramatically, that everything went pear-shaped. One soldier, a German, had survived but now his eyes were all glowy and weird, he was rasping and gurgling horrifying pleas for help. Some bloody sectoid was controlling his mind, that’s what I reckoned, but I dutifully followed the instructions, moved in close and tried to disarm him. He blew himself and one of my operatives to bits and there it was, cowering in the shadows, the little gray sod that had been ticking his brain stem. Helpful/obtrusive instructions continued to tell me what to do but only one of my squad survived, bringing the alien corpse back with him.