Hidden Power
Gohan and Krillin continue to fly towards Guru's. Krillin says that when Gohan's latent power is released, he may not even be able to challenge Vegeta, but he should be able to buy Goku more time to arrive. In Space, Goku finishes his training and returns the gravity to normal. Even he is impressed with how far he'd come. He takes a bath, drinks a sports drink, and rests the final leg of his voyage to Planet Namek. As Goku lay resting in his bed, even he does not know that he has crossed the threshold of power than any Saiyans could attain. On Namek, Gohan and Krillin finally near Guru's home, but before they get there, they sense Vegeta's energy at a very short distance away from them. Krillin stays behind and tells Gohan to go on to Guru's.
Aired 12/09/1990EP 61 - Hidden Power

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)