Prelude to Vengeance (天津飯の決意!!, Tenshinhan no Ketsui!!) is the seventeenth episode of the King Piccolo Saga and the one hundred eighteenth episode in the Dragon Ball series. The episode first aired on July 6, 1988.
King Piccolo keeps the world at suspense, as he chooses a target sector to annihilate. Yajirobe has a rough landing, having fell right through a Nimbus Cloud from atop Korin Tower. King Piccolo chooses to destroy Sector 28, which is none other than Bulma's homeland, West City. The entire city tries to evacuate in a frenzy, including Bulma's parents. A team of convicts storm the Kame House, but Yamcha and Launch beat them.
- Two characters from Akira Toriyama's one-shot Escape appear when everybody in West City is running in panic.
- Two of the three convicts were previously seen in a group of fighters waiting outside Fortuneteller Baba's Palace, and the mohawked one was previously seen eliminated by Yamcha from the 22nd World Martial Arts Tournament. The alligator with sunglasses first appeared sunbathing at Kame House in "The Nimbus Cloud of Roshi".
- Two drivers seen fleeing West City look similar to Hasky's followers.