Dr. Gero is eliminated by his own creation, Android 17.
This episode marks the first appearance and activation of Android 16 . Dragon Ball Z (Dub) Episode 134
" The Ultimate Weapon " (Funimation/Toonami). Saga: Part of the Android Saga (Season 4). " The Ultimate Weapon " (Funimation/Toonami)
Trunks, having arrived at the lab, identifies these as the ruthless androids from his future timeline. Despite Gero's threats to deactivate them, Android 17 destroys the remote control and subsequently kills Dr. Gero , decapitating and crushing his head. Despite Gero's threats to deactivate them, Android 17
In Episode 134, titled " The Ultimate Weapon " (or "Too Late to Do Anything!? The Ultimate Weapons to Kill Goku" in some versions), the Android Saga reaches a critical turning point as Dr. Gero's control over his creations finally shatters. Plot Summary
Following his retreat to his mountain laboratory, Dr. Gero (Android 20) is forced to awaken his most dangerous creations, and Android 18 , to defend himself against the Z Fighters. However, the situation quickly spirals out of his control:
Against Gero's final warnings, Android 18 activates a third, mysterious machine: Android 16 . Trunks attempts to destroy the lab with a massive energy blast to prevent this, but the androids emerge completely unharmed.