Due to problems in TVE's archive, hundreds of episodes from the seventies and early-'80s are lost or destroyed. The archive has millions of tapes in kilometers of shelves, that weren't cataloged with computers, from 1964, the year TVE started recording its programs, to 1987. From the first season, which had 54 chapters, only three have survived or are located, "El terror", "El mundo de los toros" and "El Circo", the last one being found just two years ago (2004), and from the second season, being 83 chapters long, only a dozen have been found. It's only from the third season when a big amount of chapters are located, but the first season that is completely located in the archives is the sixth season from 1987. The rest of the seasons are all incomplete.