The Last Defense (全宇宙に衝撃!! セル、完全体へ驚異の進化, Zen Uchu ni Syogeki!! Seru, Kanzentai e Kyoi no Sinka) is the seventh episode of the Perfect Cell Saga and the one hundred fifty-ninth overall episode in the uncut Dragon Ball Z series. The episode first aired on September 30, 1992. Its original American air date was October 31, 2000.
The episode starts with Semi-Perfect Cell noticing Android 18. Then Future Trunks notices what Semi-Perfect Cell is seeing and is extremely miffed by this. Then Android 18 and Krillin talk and he tells her to leave quick. Quickly after, Android 16, Android 18 and Krillin see Semi-Perfect Cell looking at them, which causes mayhem. Then Semi-Perfect Cell charges to where Android 18 is, but Future Trunks steps in and punches Semi-Perfect Cell into the ground.
Future Trunks tells them to leave and that Semi-Perfect Cell is tunneling underground. Android 18 leaves Android 16 behind, and Krillin follows. Cell blows out of the ground and Future Trunks begins to fly over. Then Vegeta blows his son into a cliff to stop him. Semi-Perfect Cell stands there, smirking. He then remarks “Vegeta is the brave one; incredibly stupid, but brave, none the less”. Then Future Trunks tries to get at Cell and is blown back by his father.
Meanwhile, up at Kami's Lookout, Piccolo is worrying about the fight, talking to himself. Bulma overhears and demands an explanation and little Trunks starts crying. Piccolo does not answer, but hopes Goku and Gohan are training hard. Back at the battlefield, Semi-Perfect Cell thanks Vegeta for getting rid of Future Trunks. Everyone tries their luck against Semi-Perfect Cell but fails. Meanwhile, Future Trunks is really mad at Vegeta and says that he will not live through Semi-Perfect Cell's wrath again. Summoning a powerful Ki Blast, he blasts Vegeta away.
In the Hyperbolic Time Chamber, Goku is carrying Gohan to his bed on his shoulders. Gohan says that Goku did not want him there because he thought he slowed him down, but Goku assures him that he would never “think something like that about his big super cool son”.
At the battlefield, Semi-Perfect Cell towers over Android 18; she attacks twice with an energy blast but it only pushes him back several feet. He laughs as he opens up his tail to absorb her. As she is about to be absorbed, Future Trunks comes in and punches Semi-Perfect Cell away as he tells Android 18 to run, then flies back to the fight. Future Trunks is punching Semi-Perfect Cell. As Vegeta arrives, Semi-Perfect Cell launches a Solar Flare, blinding everyone.
Krillin tries protecting the Androids blindly, but Semi-Perfect Cell flicks him away, Android 18 punches him but his tail funnel opens around her and begins absorbing her. As the guys get their vision back, Krillin tries to save Android 18, but she was completely absorbed. Vegeta is talking about having a worthy adversary. Future Trunks tries to stop Semi-Perfect Cell from transforming, but his little light balls do not do anything to him. Semi-Perfect Cell makes the Earth shake during his transformation and it shows everyone being scared.
- Cell absorbs Android 18 and finally transforms into Perfect Cell.
- Future Trunks (Super Saiyan Second Grade) vs. Semi-Perfect Cell
- Future Trunks (Super Saiyan Second Grade) vs. Vegeta (Super Saiyan Second Grade)
- Semi-Perfect Cell vs. Krillin
- Semi-Perfect Cell vs. Android 16
- Android 18 vs. Semi-Perfect Cell
Bruce Falconer tracks
- "Piccolo and 17 Talk" - When 2nd Grade Super Saiyan Future Trunks blocks Semi-Perfect Cell.
- "Hyperbolic Time Chamber (soundtrack 1)" - When Future Trunks tries to tell Super Vegeta that Cell cannot absorb Android 18 after emerging from the rubble.
- "Vegeta Knows His Son" - When Future Trunks tells Android 18 that Cell knows where she is.
- "16 Rips Off Cell's Tail" When Semi-Perfect Cell attempts to absorb Android 18 before 2nd Grade Super Saiyan Future Trunks punches him away.
- "Trunks Powerup" - When Trunks pummels Cell.
- "Vegeta Knows His Son" - When Cell absorbs Android 18.
- This episode is the debut of the Super Buster Cannon.
- Unlike the anime, in the manga Trunks does not actually fight Semi-Perfect Cell - although he does try and attack him, Vegeta stops him from thwarting Cell's plans to attain perfection.
- In this episode Cell uses the Solar Flare for the second, and last time in Dragon Ball Z. The next time Cell uses the Solar Flare would be in Dragon Ball GT.
- When Krillin is charging towards Cell to begin his assault to try and stop him from absorbing Android 18, the tip of Cell's tail can be seen for a split second despite the fact that he is currently absorbing Android 18.
- This was Peter Kelamis' final episode as Goku in the Ocean Group dub. He left the series to pursue a career in stand-up comedy, and was replaced by Kirby Morrow for the remainder of the dub.