American art director and production designer who worked on the abandoned Star Trek: Phase II and Star Trek: The Motion Picture before designing Star Trek II: The Wrath of Khan.
Joseph R. Jennings was an American art director with long experience in film and television design.
In 1977 he was put in charge of design for Star Trek: Phase II, the planned television revival, and began building new Enterprise sets. When the project became Star Trek: The Motion Picture, Harold Michelson took over as production designer and Jennings remained among the credited art directors.
He was production designer of Star Trek II: The Wrath of Khan, adapting the existing Enterprise sets on a tight budget, redressing the bridge to serve as that of the Reliant, and creating the Regula I laboratory and the Genesis cave.