Dragon Ball Season 1 Episode 121 The Biggest Crisis ( Air Date 1988-08-03 ) Genre Animation, Action & Adventure, Sci-Fi & Fantasy category. Overview "Piccolo Daimao puts all of Metro West on edge when he invades the King's Castle, but Goku is not about to let him take over without a fight. While Tenshinhan watches from the sidelines, the young warrior takes it on the chin and refuses to go down. It's a fierce battle but even Goku has his limits. How much can he take?".