In 1978, 20th Century Fox sued “Galactica” for copyright infringement of at least 34 similarities. In J.W. Rinzler's book "The Making of Star Wars: The Empire Strikes Back," Lucas justified his reasons for suing, saying that “Not only does it upset me because I didn't think the quality was very good, but [...] because, if I wanted to do a TV series of 'Star Wars,' I couldn't. They've already spoiled the television market."