DBZK Episode 26
From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
The Scheme is Shattered! Vegeta Strikes Back at Zarbon! is the twenty sixth overall episode in the Dragon Ball Z Kai series. The original Japanese title is "Kudake Chire Inbō! Gyakushū no Bejīta VS Zābon" (砕け散れ陰謀！逆襲のベジータVSザーボン). The episode first aired on October 4th, 2009. It's original American air date was June 30, 2010.
After being severely beaten by Zarbon, Vegeta is taken in the rejuvenation chamber to heal. Once healed he would be questioned about the whereabouts of the remaining Dragon Balls. When he recovers, Vegeta finds Frieza's Dragon Balls and creates a diversion to sneak away with them. Ultimately, his plan works. Meanwhile, Krillin returns to Bulma looking for Gohan, so Guru can unlock his hidden potential. However he finds out Gohan is looking for the Dragon Ball Vegeta hid earlier in the Namekian village's pond. He finds it and flies back to his friends. Suddenly Vegeta appears for the Dragon Ball Krillin has. Then surprisingly Zarbon appears to take Vegeta and the Dragon Balls he stole. They have another battle, this time with Vegeta stronger and prepared. Even Zarbon's transformation doesn't work this time. Vegeta rams his fist into Zarbon's stomach while Zarbon begs for mercy. Vegeta blasts clean through Zarbon, killing him. Then he turns his attention to Krillin, Bulma, and the Dragon Ball.