Dragon Ball Kai Season 1 Episode 74
Krillin decides that Bulma is taking too long to deliver the switch to turn off the androids so he decides to go and fly there himself to retrieve it as it will be quicker. Piccolo tries to warn Android #17 to run away but he refuses to leading Piccolo to try and fight him but Cell proves to powerful for him and ends up killing him.
Serie: Dragon Ball Kai
Episode Title: Run #17! The Suicidal Resistance, Piccolo
Air Date: 2010-09-26