It was the special George Lucas doesn't want you to see! When Lucas was working on the first Star Wars film, he had to scratch & fight to get funding to finish up the special effects. Twentieth Century Fox was not eager to give him more cash, but they did let him scare up the funds any way he saw fit. (Which led to him eventually getting enough money to buy them out, but that's a different story altogether.) in any case, CBS came to the rescue. They would give Lucas much needed funds in exchange for the rights to make a special based on this "Space Film" if things worked out.
When Star Wars became a sensation, CBS remembered its little option and quickly decided to cash in. George Lucas wasn't interested in the project, but he had to follow through with the deal, so he gave his grudging approval. CBS didn't seem to grasp the reason why Star Wars was a hit, so they hired a staff more suited to producing a variety show than a science fiction themed special.
The result was a disaster that George Lucas would like to forget. Celebrities who had no business being in the Star Wars universe were hired. There were bizarre, creepy sketches, including one that featured a leering wookee watching a stripping Diahann Carroll. Using the vast wealth created by owning merchandising rights to his films, George Lucas buried the special after its one airing. Many Star Wars fans dream of an official release, but Lucas has kept it hidden from public view. With his empire now owned by The Walt Disney Company, there's a new hope that the special will see the light of day.