Good Knight Johnny / Balloon Platoon / The Clueless Kid

S3 E6: "Good Knight Johnny" - Johnny wanders into a Renaissance Fair and thinks he's traveled back in time. Seeing an opportunity, he tries to impress the costumed actors with his tenuous grasp of 20th century science and reason in the hopes that they'll make him their king. "Balloon Platoon" - Johnny vows revenge after a pesky street urchin pelts him with a water balloon, and sets about turning Suzy and her rag-tag group of fellow 8-year-olds into a lean, mean, water-balloon hurling machine. "The Clueless Kid" - Johnny's karate teacher Master Hama recklessly claims that the worst of his students could beat the best of his rival's. The rival takes him up on the challenge, choosing Hama's towel boy, Johnny. The disgruntled Hama is forced to train Johnny to defend the honor of his dojo.