Dragon Ball Episode 51 English Dubbed Episode Title:The Security Guard at the Bottom of the Ocean.Episode Description:Goku and Krillin fight the Pirate robot in between evading its heavy machine gun and sword. Krillin manages to disarm the sword from it. General Blue stays in hiding watching the fight. Bulma fires a gun cannon on the robot as it skis across a pool. As Goku fights the robot with his power pole, Bulma rams a truck on it. Next, the robot drags Goku into an underwater battle, Goku narrowly escaping. The robot chases Bulma and Krillin through the hideout where all the pirates are dead. Goku recovers and rescues the other two. Goku performs an aerial attack smashing the robot. As everyone makes their way through the inner halls, the place begins to collapse. Goku takes a different route from the others. Bulma, Krillin and General Blue dive into a well.