A Certain Scientific Railgun S Episode 13: Accelerator
Episode 13 of 24 of A Certain Scientific Railgun S, aired July 5, 2013, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Thwarted in her attempt to sabotage Tree Diagram, Misaka takes her frustration out on a nearby lab that is part of the project. Meanwhile, Accelerator and #10031 carry out their experiment, while Kamijo searches for Misaka's missing sister.