A House of Dynamite ends on an explicit cliffhanger. The film presents the same 18 minutes from three different viewpoints, culminating with the President of the United States facing a nuclear crisis and the decision whether to retaliate or not. The final scene shows high-ranking officials heading toward a secure bunker as the President contemplates his options, and the movie stops without revealing the chosen course of action or the immediate outcome of the attack. The ambiguity is deliberate, inviting viewers to fill in the aftermath themselves.