A Certain Scientific Railgun

Season 2, Episode 10

Episode Title: Meltdowner

Air Date: 2013-06-14

Overview:

Having realized who Misaka is, Mugino decides to give her a run for her third-place ranking. When Frenda mistakenly leaves her doll-bombs behind while heading to the other facility, Misaka collects them and uses them to supplement her diminished powers.