Saiyan Sized Secret
Vegeta and Goku continue their one-one one battle of strength, will, and determination. Blow by blow, the two warriors seem evenly matched, until Vegeta reveals the secret power of the Saiyans...the ability to transform into a giant ape, whose rage is capable of destroying entire civilizations and planets! Can Goku find a way to stop this monstrous assault?
Aired 20/12/1989EP 31 - Saiyan Sized Secret
Dragon Ball Z
Goku is back with his new son, Gohan, but just when things are getting settled down, the adventures continue. Whether he is facing enemies such as Freeza, Cell, or Boo, Goku is proven to be an elite of his own and discovers his race, Saiyan. He meets many new people, gaining allies as well as enemies, as he still finds time to raise a family and be the happy-go-lucky Saiyan he is.
(Source: Anime News Network)