behavior. Mark McGwire appears, distracts the citizens with a long home run, and hides all the evidence under his cap. Marge takes Bart off Focusyn for good and puts him back on Ritalin. Major League Baseball, however, is still spying on the Simpson family: the autographed bat that McGwire gave Bart has a hidden camera. Production "Brother's Little Helper", which was originally called "Bart a Go Go", was written by staff writer George Meyer and directed by director Mark Kirkland. It was first broadcast on the Fox network in the United States on October 3, 1999. After the season 5 episode "Bart's Inner Child", Meyer got "a little burned out on writing scripts", so he wrote "Brother's Little Helper" in order to "try [his] hand again". While writing the episode, Meyer was going through "some psychological problems" and found the episode very difficult to write. He was initially so dissatisfied with the first draft that he turned it in with a pseudonym; Vance Jericho. Co-producer Tim Long jokingly commented that the script was "literally moist with contempt" but went on to say that it was in fact "an amazing draft". The writers discussed what sort of rampage Bart would go on during the second act, and writer Matt Selman suggested that Bart obtain a tank. In the DVD audio commentary for the episode, Selman stated that he got the idea from watching a news report about "a guy" who had died while "[going] nuts with a tank". To show the side effects Focusyn had on Bart, the animators made slight changes to his face as the episode progressed. It is first seen in the scene where Bart is reading "The 7 Habits of Highly Effective Pre-teens": a cheek line is added just under his eyes to suggest that he is starting to change. In another scene, Bart can be seen speed reading and later on, the animators drew him with "mini-pupils". The staff discussed whether Bart's pupils would be bigger or smaller than normal while he is on the drug. The writers settled on smaller pupils and, according to Kirkland, "several model sheets were going back and forth over the fax machines" until the staff were satisfied with the size of Bart's pupils while influenced by the drug. In fact, psychostimulants used to treat ADHD are more likely to cause pupils to become bigger (dilated). In the scene where he