Laboratory Basement (セル誕生の秘密! 研究所の地下に何がある!?, Seru Tanjyo no Himitsu! Kenkyujo no Tika ni Nani ga aru!?) is the sixth episode of the Imperfect Cell Saga and the one hundred forty-fifth overall episode in the uncut Dragon Ball Z series. The episode first aired on June 24, 1992. The original American air date was October 11, 2000.
In this episode, Future Trunks and Krillin decide to let Piccolo, Tien Shinhan, and Vegeta try to find Cell while they fly to the ruins of Dr. Gero's laboratory. They plan to search the debris and smoldering rubble to try and find the subterranean chamber where Present Cell in his larval form is growing under care of Dr. Gero's Super Computer. After using energy wave attacks to blow up the rubble of Dr. Gero's lab, Future Trunks and Krillin discover a ladder leading straight into the ground. They slowly float down and head into the chamber.
Cell is also having a "snack", with the Nicky Town populace as the main course.
Back at the lab, Krillin is getting ready to blast everything in the area, but Future Trunks warns him not to, and takes a quick look around the lab, discovering the plans for Android 17. In hope of using the plans to find the technological terror's weak spot, they take them and begin to blow up the lab, first destroying various machines, the super computer, and finally, the Cell embryo, firing a double blast together. As they flee from the exploding lab, Future Trunks gives the plans to Krillin, and they agree to split up, Future Trunks going off to train with his father, Vegeta, and Krillin going off to show Bulma the Android plans, in the hope that it could be used to deactivate them.
- In the plans that Future Trunks finds in Gero's lab, he says one of them is said to be for a gas powered toaster oven.