The Dodon Wave (なななっ!!なんと どどん波, Nanana!! Nanto Dodonpa) is the seventh episode of the Tien Shinhan Saga and the ninetieth episode in the Dragon Ball series. The episode first aired on December 2, 1987.
As Krillin and Chiaotzu fight their match in the World Martial Arts Tournament, the battle heats up with a powerful Dodon Ray used by Chiaotzu after he locks onto Krillin. Krillin can lose the match by being hit by the Dodon Ray. Goku learns that Mercenary Tao is Master Shen's younger brother. Chiaotzu has an advantage over Krillin, however, the episode ends with the fighters in an energy wave stalemate.
- A character resembling Konkichi can be seen in the background while Bulma, Launch, Oolong, and Turtle eat.