Despite its relatively high station clearances for its time slot and low production costs, "Dark Shadows" fell victim to the purge mainly because of its young audience, who usually did not make decisions about the purchasing of household goods and food products for the family, which were the two chief industries that bought airtime on daytime television in that era. Practically no other daytime show skewed so much under the 18–35 demographic threshold as "Dark Shadows" did. Furthermore, prime-time shows and movies with horror or science fiction themes ("e.g.", "", "The Man from U.N.C.L.E.") had been on the decline for some time, and, of course, the serial appealed heavily to fanciers of those genres, people who usually did not express much interest in the often sentimental domestic or romantic themes on which traditional soaps had relied since their inception on radio in the 1930s. In addition and probably more decisively, the program experienced a precipitous drop in its ratings during its last two years on the air, falling from a peak of 8.4 in the 1968–69 television season to a 5.3 in 1970–71. Reflecting on the series' cancellation, in an interview included in a 2005 DVD release, series creator Curtis welcomed the show's cancellation, feeling it had run out of fresh ideas: "I was just hoping it was going to end. I couldn't squeeze my brain any harder to come up with just one more story. I just wanted to move on and out."