Protect the Dragon Balls! The Namekians' All-Out Attack! (守れドラゴンボール！ナメック星人総攻撃, Mamore Doragon Bōru! Namekkuseijin Sōkōgeki) is the twenty-first overall episode in the Dragon Ball Z Kai series. It first aired in Japan on August 30, 2009. Its original American air date was June 22, 2010. Its Dragon Ball Z counterparts are "Defying Orders" and "Namek's Defense".
Goku arrives at Capsule Corporation, where Dr. Brief has prepared a spaceship for him to travel to Namek in six days, as well as train. As he takes off for Namek, Goku begins to train at 20G (20 times the normal gravity of Earth).
Meanwhile, the Namekians begin to fight back against Frieza's men, however Zarbon proves too powerful for them to handle. Discovering that his people are being located via their scouters, Moori destroys the scouters. Filled with rage, Dodoria rushes into the fray to make the locals regret the day they ever crossed Frieza.