Dragon Ball Z - episode 99 - 16 Jul, 1991

As the battle on Namek continues, Kami and Mr. Popo have found all of the restored Dragon Balls, giving King Kai an idea that might save everyone on Namek, bring back all of the fallen Namekians back to life, including Guru. Back on Namek, it turns out that Goku still isn't using his full power yet, and he regains the edge over Frieza. Enraged, Frieza powers up to his absolute maximum and charges at Goku. In response, Goku fires a Kamehameha at Frieza, setting off a beam struggle. (Source: Wikipedia)