<Table> <Tr> <Th> No . </Th> <Th> Title </Th> <Th> Original air date </Th> </Tr> <Tr> <Th> 1 ( 25 ) </Th> <Td> `` Railgun '' `` Rērugan '' ( 超 電磁 砲 ( レールガン ) ) </Td> <Td> April 12 , 2013 </Td> </Tr> <Tr> <Td colspan="3"> Following an uncomfortable run in with Misaki Shokuhō , another Level 5 esper from Tokiwadai Middle School , Mikoto Misaka meets up with Kuroko Shirai , Kazari Uiharu , Ruiko Saten and Erii Haruue as they all pay a visit to Banri Edasaki in the hospital . While Erii rekindles with Banri , who is undergoing physiotherapy , Mikoto tries to come up with a way to surprise Banri with a present everyone bought for her , only to realize she had left the bag containing the present in Banri 's ward . Just then , a criminal patient that was under watch by the Anti-Skills is broken free by some of his companions and takes Erii as a hostage . Upon learning of the situation from Aiho Yomikawa and Tsuzuri Tessō , Mikoto heads to the rooftop to try and prevent the culprits escaping via helicopter . They throw Erii off the side of the building in order to break free , but she is saved thanks to Ruiko and Kuroko . Learning that her bag is onboard the fleeing helicopter , Mikoto has Kuroko teleport her to the skies where she destroys the helicopter with her railgun , with Kuroko safely apprehending the culprits . With the incident dealt with , Banri finally opens her present from everyone , which is a Sakugawa Middle School uniform for her to wear once she recovers . </Td> </Tr> <Tr> <Th> 2 ( 26 ) </Th> <Td> `` Critical '' `` Kuritikaru '' ( 寿命 中断 ( クリティカル ) ) </Td> <Td> April 19 , 2013 </Td> </Tr> <Tr> <Td colspan="3"> Mikoto recalls in a dream of how , when she was younger , she was approached by scientists wanting to use her DNA map to help cure Duchenne muscular dystrophy . The next morning , Kuroko tries to take Mikoto through an alleyway to get to the mall , but they encounter a few people passing by . They discover this is due to someone hiding envelopes containing cash cards within the alleyways , piquing people 's curiosity to search for them . After running into Ruiko , who is also on the hunt for the money cards , Mikoto overhears some Skill - Outs who have managed to locate the source of the envelopes and decides to follow them . Meanwhile , Ruiko grows curious as she had allegedly seen Mikoto at the mall , despite Mikoto never actually getting there , with Mii Konori explaining to Kazari about a rumor of there being clones of a Level 5 esper . The Skill - Outs eventually trace the envelopes back to a Nagatenjōki Academy student , demanding she hand over the other envelopes . Things get tense , however , when it appears the Skill - Outs are gradually getting killed off by the girl , who claims to be able to freely kill anyone she has touched . When Mikoto arrives on the scene , the girl , who had simply knocked out all the Skill - Outs using anesthetic and clever acting skills , recognizes her as the `` original '' . </Td> </Tr> <Tr> <Th> 3 ( 27 ) </Th> <Td> `` Project Radio Noise '' `` Redio Noizu Keikaku '' ( 超 電磁 砲 量産 計画 ( レディオ ノイズ けい かく ) ) </Td> <Td> April 26 , 2013 </Td> </Tr> <Tr> <Td colspan="3"> Mikoto is reminded of rumors about there being a clone of her and attempts to question the girl , who was distributing the envelopes in order to fill the alleyways that security cameras can not reach with human eyes . However , the girl leaves after inadvertently setting the building on fire whilst burning the evidence , simply stating Mikoto is better off not knowing as she would be unable to stop what was happening with her power . After saving the Skill - Outs , Mikoto looks up for information on the girl , whose name is revealed to be Shinobu Nunotaba , who actually worked at the same medical facility where she had given the scientists her DNA map years ago . Mikoto infiltrates the facility and comes across a room that is separate from the rest of the building 's network . Mikoto hacks into database there and is shocked to learn that the scientists tricked her into giving them her DNA map in order to create clones called `` Sisters '' , known as Project Radio Noise . However
to aru kagaku no railgun s episode 3
Project Radio Noise