pilot's relatively weak ratings in the lucrative adult-demographic (ages 18–49), CBS picked up the series for only a limited, five-episode order (those 5 episodes were aired in April and May 1978, at the tail-end of the 1977–78 TV season). This run of episodes debuted very well, with the first obtaining a 22.8 rating with 16.6 million viewers, making it the best-rated program for the week on CBS, and the eighth-best-rated program for the week, overall. The series ended up being the 19th-highest-rated show of the entire season, but CBS was reluctant to commit to giving the show a regular/fixed time slot for the 1978-79 season, as the series was expensive to produce and continued to underperform with older audiences. CBS took the more cautious approach of airing episodes on a sporadic basis, strategically placing it on the broadcast schedule to deliberately hurt the ratings of specific competing shows, at key times in the TV season (e.g. "sweeps"). Former Six Million Dollar Man producer Lionel Siegel took over production duties for season two, noticeably changing the show in an attempt to grow its adult audience. These changes included dropping the Captain Barbera character; adding the character of Julie Masters as a love interest for Peter; creating more down-to-earth plotlines; and slightly toning-down Spider-Man's superpowers, to make him more accessible to adult viewers. The second season that consisted of seven episodes aired infrequently throughout the 1978–79 TV season. The series continued to do well in the ratings during its second season. CBS officially cancelled the series soon after the season ended. The chief reason for the cancellation was that CBS feared being perceived as merely a one-dimensional, superficial, "superhero network". It was already airing other live-action superhero series or specials at the time, including The Incredible Hulk, Wonder Woman (which they resurrected after its original network, ABC, canceled it), Captain America, Doctor Strange, and had just ended (in 1977) multi-year runs of live-action Saturday morning series for DC Comics' Captain Marvel and Isis superheroes. Another problem was that in spite of the show's popularity, its most vocal fans were also highly critical of it, due to the season two departures from more comic book-like storylines, and the lack of any recognizable "supervillains" from the Spider-Man comics. The series yielded the first live-action depictions of Peter Parker's "spider-tracer" tracking/homing devices; they are prominently featured in several episodes throughout the series. Directors Tom Blank