2x41 - Dragon Ball Z: Dragon Box

Having achieved a second transformation, Freeza begins to work an obstinate Piccolo over. Unable to bear it, Gohan leaps forward and launches a full-power Kikoha blast at Freeza, but just before it can overtake him, he manages to push it back. Once again recognizing the strength of the Saiyans, Freeza begins his final transformation. Meanwhile, Vegeta plans to use Dende's abilities to turn himself into a Super Saiyan.