Dragon Ball Z Episode 103: Pathos of Frieza
Episode 103 of 291 of Dragon Ball Z, aired August 14, 1991, 25 minutes. Available with English subtitles and dub where released.
Episode summary
As Namek gets closer to explosion it looks like Goku can beat Frieza with ease as his power keeps increasing. Finally, Goku decides to leave, knowing that he's more than a match for Frieza, but the tyrant won't give up that easily.