Art Bell and Neil Slade - The Brain
Coast to Coast from 05/18/1999, 05/08/2001, 01/02/2002
Rumble: https://rumble.com/v3gdqgs-art-bell-and-neil-slade-the-brain.html
Art Bell and "Mad Man" Marcum - Building a Time Machine
Coast to Coast interviews from 04/18/1995, 07/30/1996, Midnight in the Desert from 09/04/2015
Rumble: https://rumble.com/v3c2zwa-art-bell-and-mad-man-marcum-building-a-time-machine.html