Yeah, right. If Lex had wanted her know about Nightfall, he had had more than ample opportunity to disclose that information to her.
I think you want a "to" between her and know.
“He’s a source!” Lois repeated, and then lowered her voice. “Look, when I was at the bunker the other night, Lex hinted that the powers-that-be knew Nightfall was coming last spring, and knew that it supposed to come close, but not hit.”
I think it should be "that it was supposed to".
