Episode Name: Cell’s Mighty Break Down
Air date: 12/18/2000
Summary: Cell uses every one of his stolen moves against Gohan, but none of them work, Gohan catches his Destructo Discs and deflects his special beam cannon as if it was a beach ball. Cell then uses his ultimate move, the Kamehameha wave, but Gohan sends a second wave straight back at him, causing a great deal of his body to disintegrate, but Cell quickly regenerates. Unable to beat Gohan at his present state, Cell bulks up his muscles, increasing his strength, but he has forgotten that this is the same mistake Trunks made, and though he may have the power to beat Gohan, he can’t catch him. Gohan punches Cell, and he is violently sick, he coughs up the source of his power, Android 18.  

Watch or download Dragon Ball Z – Season 10 Episode 22 – Cell’s Mighty Break Down at below links.