Apocalyptic culture in contemporary American encompasses a wide range of ideologies and preoccupations, from UFOs and comets to messiahs, Marian cults, and Mayan calendars. The story of Jesus Christ’s return to earth, which is a part of Christianity, has been central to American apocalypticism. The most common form of Christian apocalypticism in contemporary America is “dispensational premillennialism.” This chapter examines apocalypticism in contemporary Christianity in America. It first discusses the concept of dispensational premillennialism before turning to apocalyptic determinism. It then considers the structure of an apocalyptic worldview, prophecy belief as a lens through which the world is read, the role of mass media in communicating and disseminating apocalypticism, the promotion and protection of the “interests of Israel” on the world stage, and the complexities of Christian Zionism’s orientation to Israel.