2x18 - Dragon Ball Z: Dragon Box

Freeza's men, Buleberry and Raasberry, listen to Bulma's story, and begin plotting to take the Dragon Ball for themselves. She dupes the two into believing that the remaining Dragon Balls are still in the sea, and leads them down underwater in her submarine, but along the way, they discover that she was lying to them! Meanwhile, Goku had overcome the 100 G environment inside his spaceship.