|"Unbelievable!! Saibaimen, Born from the Soil"|
|Rōmaji||'nna Baka na!! Tsuchi kara Umareta Saibaiman|
|FUNimation||The Darkest Day|
|Corresponding edited Z episode||DBZ015 (Edited)|
|Corresponding Kai episode(s)||DBK009|
|Manga||Chapters #213 & #214|
|Japanese||October 11, 1989|
|English||July 14, 2005|
"Unbelievable!! Saibaimen, Born from the Soil" (んなバカな！！土から生まれたサイバイマン, 'nna Baka na!! Tsuchi kara Umareta Saibaiman; FUNimation "The Darkest Day") is the twenty second episode of the Dragon Ball Z anime.
After a year of space travel, the two Saiyans, Vegeta and Nappa, arrive on Earth. To celebrate their arrival, Nappa completely destroys the Eastern Capital with ease by creating an energy blast. Sensing their power, the Dragon Team mobilize for an attack. The Saiyans search for any large fighting strength with their scouters, and they head toward Piccolo and Gohan. Just when Kulilin shows up to help, the Saiyans also arrive. Piccolo learns that he is a Nameccian, because Vegeta recognizes the green skin that is typical of Nameccians. Yajirobe knows the threat as well, but instead of stopping them, he is posing as the leader of the Dragon Team to get food.