Dragon Ball Z Episode 79: Gohan Attacks
Episode 79 of 291 of Dragon Ball Z, aired February 20, 1991, 25 minutes. Available with English subtitles and dub where released.
Episode summary
While Vegeta and Frieza verbally battle each other, Frieza reveals a terrible secret: he was the one who destroyed Planet Vegeta, killed Vegeta's father, and wiped out the majority of the Saiyan race. Without allowing Vegeta and the others to recover from this terrible revelation, Frieza reveals another stunning development: his power to transform! Will Vegeta, Gohan and Krillin's combined strength be able to topple Frieza's new stronger form?