Frank Joseph, editor of Ancient American magazine, explores archaeological evidence for lost civilizations while Linda Moulton Howe revisits the famous Bigfoot scream audio that has become synonymous with the program. Joseph presents evidence suggesting that advanced civilizations like Atlantis may have existed in Earth's distant past, drawing from archaeological anomalies and cross-cultural mythological accounts found worldwide. The conversation examines how various ancient sites and artifacts suggest technological capabilities that challenge conventional archaeological timelines and evolutionary assumptions. The episode revisits the haunting Bigfoot vocalizations with additional analysis and continued listener responses to the mysterious creature's calls. Joseph discusses connections between Atlantean theories, unexplained archaeological discoveries, and modern encounters with unknown entities like Bigfoot, suggesting these mysteries might be interconnected aspects of hidden history. Art Bell facilitates discussion that weaves together ancient mysteries, cryptozoology, and archaeological anomalies into a comprehensive examination of what mainstream history might be overlooking. The show demonstrates how different types of unexplained phenomena - from lost civilizations to unknown creatures - could represent aspects of a larger hidden reality that challenges accepted historical and scientific paradigms. Joseph's research into ancient American civilizations provides fresh perspective on how pre-Columbian cultures might have possessed advanced knowledge now lost to mainstream historical understanding.