A Certain Scientific Railgun Episode 20 English Dubbed Episode Title:Poltergeist.Episode Description:The episode starts off with a moderate sized night time earthquake that disrupts Mitsuko from studying. After the quake subsides, Mitsuko's teacup mysteriously falls down from her desk, along with her entire doll collection floating around. The next day, Kazari is informed by Daigo that she is getting a new roommate, a transfer student named Erii Haruue. Mikoto and Ruiko take Erii out to show her around while Kazari, Kuroko and Konori attend a meeting held by Therestina Kihara Lifeline of the Multi Active Rescue (MAR), concerning earthquake-like "Poltergeist incidents" caused by multiple espers simultaneously losing control of their abilities. That night, Mikoto and Kuroko skip out on their curfew to celebrate Erii's arrival with Ruiko and Konori at the local fireworks festival. Erii starts to reminisce about her past with her new friends, falling into a trance and wandering off on her own. Kuroko gets a call from Konori, who has discovered the Poltergeist incidents have been created on purpose, but another Poltergeist incident occurs near Kazari and Erii, who are saved from a falling lamppost by Therestina. As the girls slowly realize what has happened, a familiar woman is seen in the crowd below.