Dragon Ball Super Episode 21: “Resurrection ‘F'” is the 21st episode of the Dragon Ball Super anime series. It was first aired in Japan on August 30, 2015, and in the United States on January 16, 2017. The episode features the return of Frieza, who was previously killed by Goku in the Dragon Ball Z series.
In this episode, Frieza is revived by his loyal subordinates Sorbet and Tagoma, who travel to Earth to seek revenge on Goku and the other Z Fighters. Frieza arrives on Earth and quickly defeats Krillin, Gohan, and Piccolo, before engaging in a fierce battle with Goku and Vegeta. Goku is eventually able to defeat Frieza with the help of Vegeta, but Frieza is able to escape before he can be killed.