Dreyman says "my place is safe" to Paul in the park. Sure, he didn't know it, but Wiesler was the one keeping it safe.
Look carefully at the young man handing Wiesler the earpiece saying "the Wall has fallen." It's the same guy who told the joke in the canteen.
In Dreyman's play, at the very beginning, Christa-Maria's character says, "Why am I not spared these visions?" This could reference any number of things that happen in the film, but considering it cuts to Wiesler immediately after, it could be a reference to his being conflicted between protecting Dreyman and fulfilling his duty to the Stasi.
