Rescue Goku (悟空を救え!最後の味方登場, Goku o Sukue!! Saigo no Mikata Tojo) is the fifteenth episode of the Shadow Dragon Saga and the sixty-second overall episode of Dragon Ball GT. The episode first aired on November 5, 1997. Its original American air date was January 15, 2005.
Omega Shenron decides to retrieve the Dragon Ball while killing Goku and moves in for the kill. Then, the Dragon Ball starts glowing and flies in between Omega and Goku, revealing to be Nuova Shenron. Goku is happy to see him, but Nuova is cold and speaks with Omega, who tells him to kill Goku. Nuova seems excited and tells Goku that he will not be merciful. Vegeta attacks Nuova, but the Shadow Dragon is too fast for him and blasts him away. He then attacks Goku, who can not land a hit on Nuova.
Trunks checks on his father, who is unharmed. Vegeta realizes that Nuova is fooling them and was not trying to hurt him and Goku. His suspicions are confirmed when Omega tells Nuova to finish Goku off so he can fight someone better, and Nuova and Goku attack Omega together. Omega says that Nuova should have been charged up with full negative energy, but when Goku swallowed the Four-Star Dragon Ball, some of Goku's positive energy was passed into Nuova. Nuova binds Omega and traps them in a fire ball, where Nuova plans to burn and destroy Omega himself.
When the ball explodes, Nuova appears and it seems that its over. However, Nuova breaks apart and Omega reappears; he says that he forced the six Dragon Balls into Nuova, moving himself into Nuova's dragon body. He now has all seven Dragon Balls and is as powerful as before. Vegeta tries to power up, but reverts to his normal form, because the Blutz Wave Generator has been destroyed. With Goku and Vegeta in their normal forms, they are at Omega's mercy.