During the 1990s, he hosted and narrated the documentary series Biography on A&E. He also acted in a number of films featured on Mystery Science Theater 3000, which subsequently featured running jokes about Graves’ Biography work and presumed sibling rivalry with Arness. The films that have been featured on Mystery Science Theater 3000 include SST: Death Flight, It Conquered the World, Beginning of the End, and Parts: The Clonus Horror.