A Certain Magical Index II Episode 19: The Researcher (Amata Kihara)
Episode 19 of 24 of A Certain Magical Index II, aired February 17, 2011, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Accelerator attempts to make amends for his past by doing a few good deeds, but ends up attacked by a group led by someone from his past. Meanwhile, Toma discovers strange goings-ons in the police force and overhears talk of an intruder in Academy City.