Classic Creatures: Return of the Jedi
From Wookieepedia, the Star Wars wiki.
Classic Creatures: Return of the Jedi is a 1983 documentary on the making of Star Wars Episode VI: Return of the Jedi.
It was issued as a triple feature with The Making of Star Wars and SPFX: The Empire Strikes Back in 1983. It has not been reissued in any video format in the United States since then.
