The Dark Prince Returns
In an all out assault against Vegeta, Babidi uses his power to undo the unsuspecting Prince from within. Vegeta is stripped of his good qualities by the wicked wizard, and becomes the heartless warrior that he once was. Vegeta's first senseless act under his new master is attacking Goku!
Aired 25/05/1994EP 228 - The Dark Prince Returns
1989
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)