Dr. Ritsuko Akagi, NERV's chief scientist, explains to Shinji more of the classified real nature of Second Impact, the Angels, and the mission of the Evangelions to defeat them. A rival organization of NERV builds a prototype giant robot, Jet Alone, meant as an alternative to the Evangelions, which this new robot line will supersede. Unlike the Evangelion units, which rely on external or limited battery power, the Jet Alone has an on-board nuclear reactor and can thus function indefinitely without external power. However, during the first public test of Jet Alone, it goes out of control and starts marching toward a nearby city with its reactor building to a meltdown. Shinji keeps the robot at bay in his Evangelion while Misato gets inside and attempts to shut down the reactor, only to find out that the apparent threat of a meltdown was staged by an act of sabotage. After everything is said and done, Ritsuko and Gendo discuss the fate of Jet Alone, revealing that they were behind the sabotage.