 "Thundarr the Barbarian" is set in a future (c. 3994) post-apocalyptic wasteland divided into kingdoms or territories — the majority of which are ruled by wizards – and whose ruins typically feature recognizable geographical features from the United States, such as New York City, Los Angeles, Las Vegas, Seattle, the Badlands, Mount Rushmore, Denver, Atlanta, Boston, San Antonio and its Alamo, San Francisco, Washington, D.C., Cape Canaveral, and the Grand Canyon.Other episodes with recognizable settings are set outside the United States, include Mexico and London, U.K.. Another notable feature of this future Earth is that the Moon was broken in two pieces.The shattered moon and the ruins of the former human civilization were caused by the passage of a runaway planet between the Earth and the Moon in 1994, which, from scenes shown in the opening sequence, caused radical changes in the Earth's climate and geography.