and the media press during the Kids' WB upfront sales presentation in New York. Johnny Test was created and executively produced by Scott Fellows, who also created the Nickelodeon live-action series Ned's Declassified School Survival Guide, Big Time Rush, and 100 Things to Do Before High School; Fellows had also served as the head writer for The Fairly OddParents. The show premiered on September 17, 2005, on Kids' WB's Saturday morning lineup of its weekly fall schedule, alongside Loonatics Unleashed and Coconut Fred's Fruit Salad Island. The episode pair "Johnny to the Center of the Earth" and "Johnny X" marked the series premiere. When the show first aired on Kids' WB, it performed very well in the Nielsen ratings. It ranked as the #1 broadcast program in Boys 2-11 (garnering 2.4/11), ranked as the #2 broadcast series in Kids 2-11 (gaining 2.2/10 in the process) and Girls 6-11 (2.3/11), and ultimately ranking #3 in Kids 6-11 (receiving 3.0/14). Its second season received a slightly higher number of viewers on average in the United States: 2.6 million viewers per 2nd-season episode. Its 3rd season's average number of viewers in the United States was 3.1 million viewers. Its 4th season got an average number of about 4.3 million viewers per episode in the United States. Its 5th premiere attracted over 4.7 million viewers in the United States. The series was developed for television by Aaron Simpson, with a brief, slightly longer pre-existing pilot short produced by Simpson as well, before the show was picked up as a full series by Kids' WB. Based on Episode 1A "Johnny to the Center of the Earth", the pilot episode was animated roughly in Adobe Flash, but retaining the same plot, used the same color schemes as the aforementioned episode, and was recorded with an American voice cast (retaining James Arnold Taylor as the voice of Johnny Test) instead. The original production design (including character designs, prop designs, and background designs) was created, provided, and contributed by Matt Danner and Marc Perry, and then later worked on by producer Chris Savino and art director Paul Stec at season 1. Fellows, the creator of the series who had interested the network in the series' premise, based the titular character on himself when he was a young boy; he based Johnny's twin sisters, Susan and Mary, on his own two sisters, also named Susan and Mary. In the