The Hunt for Cell is On! Goku, Back in Action! (神出鬼没のセルを討て！ついに復活、孫悟空！ Shinshutsu-Kibotsu no Seru o Ute! Tsui-ni Fukkatsu, Son Gokū!, lit. Attack the Elusive Cell! Son Goku, Finally Revived!) is the seventy-first episode of Dragon Ball Z Kai. Its Japanese air date was September 5, 2010. Its American air date was July 7, 2011.
After Piccolo has finished explaining, Vegeta flies off stating that he wants to surpass the power of a Super Saiyan. Future Trunks and Krillin go to Dr. Gero's Laboratory to destroy the incomplete Cell so he will not be born in their timeline, while Piccolo and Tien Shinhan stay behind to search the surroundings.
Future Trunks and Krillin arrive and blast the pile of rubble with their ki and discover a ladder which leads underneath the laboratory into a room containing Dr. Gero's Supercomputer and the incomplete Cell. They search around and discover the blueprints for Android 17, then they proceeded to destroy the basement, especially the present Cell and Dr. Gero's computer. Krillin takes the prints to Capsule Corporation, while Future Trunks decides to go and train with Vegeta.
Krillin delivers the prints leaving Bulma and her father to start finding a weak spot on Android 17. Krillin, taking a short-cut back to Kame House, encounters Cell who is just about to absorb his next victims, arriving in the nick of time to save them. Krillin, being no match for Cell, tells the civilians to escape, then uses the Solar Flare to blind Cell in an attempt to escape by grabbing on to an airplane, but Cell quickly recovers and jumps on top of the plane and starts attacking Krillin again. Just when it seems hopeless for Krillin, Piccolo and Tien arrive to save Krillin. Cell, sensing their arrival, flees while hiding his presence so no one can track him.
Three days later, the news continues to report about Cell's killings. Everyone decides to ride in a hovercraft to reach Cell so that he will not be able to sense them approaching him. Back at Kame House there is a loud rumble causing Chi-Chi to go and check on Goku but on arrival sees Goku is gone. She looks out of the window and sees that Goku is outside and that it was Goku making the loud noise by performing the Kamehameha technique. Goku tells Chi-Chi that he has fully recovered from the illness and that he knows everything that is going on because he read everyone's minds while he was dreaming but says that he plans on training to surpass a Super Saiyan before going off to fight Cell.