A Certain Scientific Railgun S Episode 9: AIM Stalker
Episode 9 of 24 of A Certain Scientific Railgun S, aired June 7, 2013, 25 minutes. Available with English subtitles and dub where released.
Episode summary
As Misaka continues her way into the research facility, she and Mugino play a game of cat-and-mouse. Meanwhile, at the other facility, Nunotaba sneaks into a control room, planning to disrupt the experiment by adding a new factor to the Misaka Network.