Toaru Kagaku no Railgun T Episode 21 English Subbed Episode Title:Doppelganger.Episode Description:Misaki looks into Ryöko Kuriba, who allegedly came up with the plans for Indian Poker. She learns that Ryöko was part of her experiment using cyborg technology to turn her into two people before being rejoined to determine if a soul could be created. As Mikoto is sent by Misaki to investigate the results of the experiments, the cyborg Doppelganger of Ryöko left after the experiment, who believed herself to be human, experiences an identity crisis and breaks out of her facility. Mikoto and Misaki then confront the original Ryöko about the threat Doppelganger poses, while another underground group known as Scavenger is dispatched to hunt down Doppelganger.