Dragon Ball Z KAI Season 4

Cell has finally reached his perfect form, and he won't rest till civilization falls! Only a herculean effort by Earth's heroes can stop Cell's rampage, but a superhuman slugfest of unprecedented brutality leads to Goku's shocking retirement! Young Gohan alone must now battle the monster and his miniature minions. The outlook appears bleak, but somewhere Goku lurks, waiting to lend his strength to Gohan for one final Kamehameha Wave. Will it be enough to save the world?!