Hound Dog (Hound Squad)
Accelerator manages to escape from Kihara, taking Index with him. Elsewhere, Toma and Last Order are on the run from Hound Dog—but the real threat to their lives may come from Vento.
Aired 25/02/2011EP 20 - Hound Dog (Hound Squad)

2010
A Certain Magical Index II
Index is still a fugitive, and many powerful magical organizations and individuals want to take her to use the books in her memory, eliminating her in the process. War between those organizations is also starting to emerge. Index can only rely on her friend Touma, who has always protected her, along with Misaka and other friends from the Academy.
(Source: Anime News Network)