Himself
Clark Ashton Smith: The Emperor of Dreams (2018)
Self
Pencils Down! The 100 Days of the Writers Guild Strike (2014)
Charles Beaumont: The Short Life of Twilight Zone's Magic Man (2010)
himself
Dreams with Sharp Teeth (2008)
To My Great Chagrin: The Unbelievable Story of Brother Theodore (2007)
40 Years of Star Trek (2006)
Legends of the Dark Knight: The History of Batman (2005)
Shadows in the Dark: The Val Lewton Legacy (2005)
Impressions of Dune (2003)
The Overstreet World of Comic Books (1993)
Self - Host
The Masters of Comic Book Art (1987)
Television: The Enchanted Mirror (1981)
Guy with Barbara and Brunette (uncredited)
The Godson (1971)
Thanks
Ant-Man i la Vespa: Quantumània (2023)
Terminator (1984)
Writer
The Starlost: The Beginning (1980)
Novel
A Boy and His Dog (1975)
Screenplay
The Oscar (1966)