Horsing Around

Horsing Around is the seventy fifth episode from Season 1.

Plot
Dennis and Tommy are racing on their skateboards. Tommy overtakes Dennis, prompting Dennis to overtake him by bumping into his skateboard, sending it flying. Tommy's skateboard grabs the attention of a horse wallowing in mud. After Tommy fell off, he argues with Dennis that he cheated by bumping into his skateboard. As Dennis calls Tommy a sorehead, Tommy argues that his head isn't the one that's sore.

Tommy spots a horse riding on his skateboard, and he and Dennis chase after him until the skateboard crashes, sending the horse flying into a haystack. When Dennis comes up to the horse, he pets him. Tommy finds it lucky the horse didn't break his skateboard despite the horse's weight. Dennis says he likes the horse, and Tommy says the horse couldn't win the race. As Dennis gets onto the horse's back, he names him "Horace".

Horace giddies up and starts galloping. Eventually, Tommy asks Dennis to go home, and Dennis bids farewell to Horace. Little did Dennis and Tommy know that Horace was following them or that Horace belongs to a local Southern man. As Horace enters town, a barber sees him and unintentionally cuts his customer. While passing a pizzeria, the pizza chef, who is spinning dough on his finger, flips the dough onto his own head. Tommy starts to have the feeling he and Dennis are being followed. They look behind, only to see nobody. Horace cleverly hid from the two boys.

Later, at the Mitchell place, Dennis ties cushions to Horace's hooves, to Tommy's objection, until Dennis jokes Horace is a "horseguest". Tommy leaves after hearing Dennis' pun. Dennis enters his house, ensuring the coast is clear, and Horace tries to walk in as quietly as possible so not to grab Henry's attention. After hearing the stomping, Henry accuses Ruff of being the one stomping. When Ruff goes into Dennis' room, he is shocked to see Horace. Dennis introduces Ruff to Horace, who whinnies. As Alice hears this, Dennis lies that he's clearing his throat.

When it's dinner time, Dennis promises to get Horace some food. Dennis surprisingly eats his dinner rapidly. After Alice calls Dennis a "workhorse", Dennis clears his throat as if it were hoarse. Dennis asks if he could take a snack to his room, to which Alice agrees. Much to Alice's surprise, Dennis is taking carrots to his room, only for Henry to jump to the conclusion something strange is happening. Horace wolfs down on the carrots, much to Dennis' surprise considering his distaste for carrots.

When Dennis' parents see something disguised as a lampshade, Henry takes off the sheet to see Horace. Dennis explains everything and wants to race him in the hometown derby. Once Henry explains someone already owns Horace, Horace's owner arrives. Horace's owner, Mr. Tedrow, explains everything about Horace, and that everyone saw Horace with Dennis. Alice explains that Dennis named Mr. Tedrow's horse "Horace". Mr. Tedrow explains that Horace isn't racehorse material because he likes to wallow in the mud. After Dennis pleads to use Horace as a racehorse, Mr. Tedrow agrees to let Dennis race Horace and train him.

The next day, Tommy aerobicizes Horace into shape with exercise music. Dennis comes up and tells Tommy that he wasn't supposed to aerobicize Horace, but instead ride him. Much to Dennis' dismay, Margaret comes along on her horse and teases Horace by calling him an "ugly broken down old nag". Dennis jokes that he and Tommy call the horse "Margaret", much to Margaret's anger. Margaret continues to scoff that she'll win the race with her horse, named Georgia. Tommy admits that Georgia looks good. Dennis agrees to make Horace look good.

Dennis and Tommy start off by washing Horace, that is until Horace wallows in the mud again. The day of the hometown derby has arrived. When the race starts, Horace isn't running as fast as the other horses, with Georgia in the lead. Soon, it starts to rain, making the racetrack all muddy. Thanks to the muddy track, Horace is able to run faster and catch up to the other horses, eventually overtaking Margaret and Georgia, but not without splashing them with mud. Horace and Dennis at last win the race, much to Mr. Tedrow's delight.

At last, the rain stops, and Horace wins his prize. Alice is surprised how short the rain lasted, but Dennis explains the rain lasted long enough for Horace to win. Margaret comes along on Georgia, both still covered in mud, and Margaret angrily gives Dennis a present, turning out to be a ball of mud. She throws the mud in Dennis' face, much to Horace's amusement. Dennis says Horace was the one with the last laugh, and everyone laughs along with them.