As time passes, the Z Warriors become aware of the new androids as they battle again and again but always reach a stalemate. However, the Z Warriors are still no match for the androids because the androids are robots, and therefore do not tire in a long battle while the Z Warriors and only human and eventually run out of energy. Gokou, who was fighting the androids, suffered a heart attack and retreated. Trunks, who was sent back in time by the future trunks to save Gokou so that Gokou would live to fight the androids and change the future, carries the medicine his mother gave him. Gokou is saved, but the Saiyans still do not continue to fight the androids. Instead, they train in a chamber to get stronger. Piccolo, meanwhile, has fused with Kame, his half father. Later, Androids #17 and #18 grow tire of following Dr. Gero's commands. As a rebellion, they kill him. But, the doctor had just finished creating Android #21. Before he died, he issued the final command to his new android to feast on the rebellionous androids. Android #17 and Android #18 leave the lab and unleash Android #16. But as it turns out, Android #16 is a peaceful android. Androids #16, #17, and #18 go to seek Gokou to destroy him. But to stall time while the Saiyans train in the chamber room, Piccolo finds the androids first and begins to fight them. Back in Android #20's lab, Cell has finished developing and breaks out of the giant "test tube", promising to fulfill his creator's wish. Cell now flies to find and destroy the androids. On his way, he gets stronger by using his tail, whose end opens, to devour the souls of the unlucky civilians he passes. As a result, he gains their energy and grows stronger. Finally, he meets with the other androids. To our heroes' surprise, they learn that Androids #17 and #18 know nothing about Cell and that they are instead enemies. Android #17 tells that he will destroy Cell and heads out to fight him. But, he does not stand up to Cell and is easily defeated. This is when our heroes learn the great powers of Cell. Android #18 is now worried, but Android #16 flies out to fight Cell. To everybody's amazement, Android #16 is able to stand up to Cell. However, he is still destroyed. Cell now heads for his goal and devours Android #17 with his tail. Cell now changes into Cell--form 2. With the power of Android #17 combined to his, he becomes stronger than ever. Then, he heads over to devour Android #18. Android #18 tries to escape, but she is still eventually devoured. Cell now changes into Cell form 3, the strongest form he could reach. Cell, after devouring the souls of so many people, is no longer an android and becomes organic. After Cell is gone, Bulma collects the body parts of Android #16 and repairs him. But, he is re-programmed to fight on the Z Warriors' side. Our heroes now head out to fight Cell. But, Android #16 is once again destroyed. Cell grows strong enough and reproduces. From his body came 7 Cell Juniors, young, blue duplicates of Cell. After a few more battles, Gohan, now a teenager, grows angry enough and reaches Super Saiyan level 2 and destroys all the Cell Juniors. In one of the battles that follows, Cell is kicked and Android #18 is spit back out. Cell turns back into form 2 and is defeated. But, he activates his self destruction mode so that when he dies, the world will blow up with him. To save the Earth, Gokou teleports Cell out of Earth and into Kaiou's planet, where Cell blows up. Thus, Gokou, Kaiou, Kaiou's gorilla, and Kaiou's grasshopper die as well. The Z Warriors mourn the loss of Gokou, but at the same time they cheer at the victory over Cell. Unexpectedly, a fireball flies out of nowhere and pierces through Trunks. Upon Trunks' death, Cell, in form 3, appears. He tells that when he blew up, a brain cell survived. From the cell, other cells multiplied and he was once again formed. Cell happily laughs as he tells that he is amazed he is able to rebuild himself into form 3! Then, Cell threatens to destroy the earth. Now it was up to Gohan to try to save our planet. With one arm (the other injured when he went to let a fireball meant for Vegeta hit him), Gohan prepares a fireball. He fires at Cell and Cell fires back. A stalemate is meant, but with Kaiou's help, Gokou is able to talk to Gohan and encourages him. Meanwhile, Klilyn protects the unconscious Android #18 and Yamcha, Ten-shin-shin, and Vegeta attack Cell in hope that this will Gohan distract Cell. With the help of the now dead Kaiou, Gokou, also dead, is able to communicate with Gohan and encourages him to use all his power to defeat Cell. Gohan overpowers Cell and Cell is disintegrated by Gohan's fireball.