Catherine Albanese is Professor Emerita in Comparative Religions & Research at the University of California, Santa Barbara and author of Nature Religion in America: From the Algonkian Indians to New Age (University of Chicago Press, 1991) and America: Religions and Religion, 5th. ed. (Belmont, Calif.: Wadsworth, 2012).

Bret Carroll is an assistant professor of history at California State University, Stanislaus, and author of Spiritualism in Antebellum America (Indiana University Press, 1997).

James R. Lewis is a lecturer in religious studies in the philosophy department at the University of Wisconsin-Stevens Point. He is the editor of Scientology (March 2009), described as a comprehensive examination of the church’s theology, growth and controversies.

Echo Bodine is a Minnesota-based psychic who serves as a consultant on numerous television shows about the supernatural.

Troy Taylor specializes in Midwestern ghosts and paranormal phenomena. He is also the founder and president of the American Ghost Society. He is based in the Chicago area.

Paul Allen Williams is an assistant professor in the department of philosophy and religion at the University of Nebraska, Omaha, and was editor of the Journal of Religion and Film from 2004 to 2008. He also teaches courses on African religions, the history of Christianity, world religions, Islam and New Testament.

Steven Wolff directs the South Texas Ghost Hunters Alliance, a nonprofit group of paranormal investigators who hunt ghosts in the San Antonio area.

John Hannah is a professor of historical theology at Dallas Theological Seminary in Texas. He has written about the Toronto Blessing and other mystical phenomena in the Pentecostal tradition.

Guillermo Fuentes is the executive director of San Antonio Paranormal Investigations, which investigates ghosts and other paranormal phenomenon throughout Texas and the Southwest.