Dragon Ball Z Episode 166: What Is the Tournament?
Episode 166 of 291 of Dragon Ball Z, aired November 25, 1992, 25 minutes. Available with English subtitles and dub where released.
Episode summary
While Trunks tells the others of Cell's plans to hold a tournament, the diabolical android begins his preparations for the competition by constructing a fighting arena. Do the Z Fighters have a chance, or is this a one-sided contest that only Cell can win?