Strong Medicine

Strong Medicine is the fifty ninth episode from Season 1.

Plot
PeeBee is preparing his next experiment by figuring out which wire to hook to the terminal, when Dennis arrives. PeeBee explains he's working on a radiuscopic-gamma-ray-therma-specto-graph, which makes anyone ten times stronger than they already are. PeeBee warns Dennis not to get too close because of how dangerous the rays can be. At this moment, Willy jumps out of Dennis' pocket, making a mess of PeeBee's equipment. Willy then jumps on a button.

The fan turns on, and then the ray turns on, in which Willy jumps in. As Dennis catches Willy, Willy pulls Dennis along, showing that the experiment works. PeeBee expects he'll be on the front cover of the Young Genius Magazine. As Dennis jumps into the ray, Willy jumps higher than before, and bursts a waterpipe. Dennis solves the problem by scrunching the waterpipe, thus showing his strength, and then bends a pole. PeeBee asks Dennis if he knows what this means, and Dennis explains he won't have to eat anymore spinach.

Later, Dennis bounces a ball so hard, it flies into the air. Next, he smashes the ball into the ground, making a hole in it. As he does this, Gina is calling for her cat Princess to come down from the roof for a bowl of cream. Dennis comes over and Gina explains the matter. Dennis uses his strength to jump on the roof to get Princess down, but Princess runs into a tree. Dennis jumps into the tree, and gets Princess out. As Dennis gives Princess back to Gina and departs, Gina says to herself "What a guy!".

Meanwhile, Willy has run out of strength, and PeeBee tries to get him to jump, but Willy goes to sleep. At that time, a bully comes up to a kid on a swing, and gets him off. This is where Dennis grabs the swing and the bully flies off, with the kid, Margaret, and Gina watching. The bully comes up to Dennis, and Dennis tries to tell him to stop picking on little kids, but to no avail. Dennis prepares to demonstrate his strength to the bully. PeeBee stops the fight and explains to Dennis that Willy has used up his strength, meaning that Dennis' strength has worn off too.

Dennis tries to prove PeeBee wrong by breaking some bars and then a stick, but to no avail. The bully is tired of Dennis stalling, and upon seeing Willy, he freaks out due to his hate for frogs. Dennis tries to convince the bully that frogs are harmless little things. Willy jumps into the bully's shirt, causing the bully to flail about and run away, crying "He put a frog down my shirt!". As Gina, Margaret and the little boy come up to Dennis, they showed how impressed they were. Margaret calls Dennis an honest-to-goodness hero, but Dennis explains Willy is the true hero. As Dennis shows Willy to Margaret, saying he's the real hero, Margaret freaks out and runs away, crying "Dennis stuck a frog in my face!". Dennis then jokes that due to their distaste in frogs, Margaret and the bully would make a lovely couple.

Trivia

 * Dennis saying he won't have to eat anymore spinach due to his strength may be a reference to the comic character, Popeye.