Raw footage of a video-recorded interview with Clyde Tombaugh conducted at Lowell Observatory in Flagstaff Arizona, at New Mexico State University in Las Cruces, N.M., and at his home in Mesilla Park, N.M. for "Clyde Tombaugh and the Discovery of Pluto." Topics discussed include his search for Planet X, his discovery and naming of the planet Pluto, Purcival Lowell and the founding of the Lowell Observatory, telescopes, and the building of and his experiences with the astrograph.