Hey Arnold!

Arnold and Helga are chosen to represent the school in the city wide spelling bee. Arnold has serious plans for the $500 prize money, but Helga has other ideas. / Arnold takes one of his sick pigeons to the mysterious Pigeon Man who miraculously cures the bird. To show his gratitude, Arnold convinces the Pigeon Man to come down off his roof and walk around the old neighborhood.

When Helga's older sister, Olga, comes home from college and gets all of her parents' attention, Helga plots to sabotage her sister's visit by altering her college grades. / Arnold and Gerald save up cereal box tops to get a telescope before the arrival of Salley's Comet.

Arnold's pet pig, Abner, escapes one night while Arnold is sleeping. / When Arnold tries to bring Grandpa's pocket watch home from the repair shop, Arnold accidentally drops it down a hole in the street. He plunges into the darkness to retrieve it and finds himself in a strange subterranean world ruled by the self-proclaimed King of the Sewers who has no intention of giving up his new watch!

Eugene is falsley accused of pulling a fire alarm. Arnold acts as Eugene's advocate before the student jury who all want to wrap up the case quickly before Wrestlemania begins. / When Arnold becomes fascinated with the Book of World Records, he and Gerald set out to set a world record of their own.

Arnold gives an amateur magic show behind the boarding house and, for his big number, makes Helga actually disappear. / When Arnold accidentally beans Harold in a baseball game, the bully vows to "kill" him, and gives him 24 hours to live.

Arnold and Gerald get jobs working for Mrs. Vitello in her flower shop. When Mrs. Vitello wrenches her back, she asks Gerald to be in charge, which puts the two friends at odds. / For a science fair project, Helga and Arnold must study the effects of twenty-four hours of togetherness in Grandpa's dilapidated old greenhouse.

When Arnold draws Mr. Hyunh's name in the boarding house's Secret Santa, he decides to make it the most special Christmas ever for the lonely boarder and tries to reunite Mr. Hyunh with his long-lost daughter.

Helga hatches a plan to "hire" Stinky to act as her boyfriend in hopes of making Arnold jealous, but it backfires when Stinky realizes that his love for Helga may be real. / When Miss Slovak calls in sick, Arnold is instantly smitten with the new substitute teacher.

When Helga chooses Phoebe as her replacement for Hall Monitor, she teaches Phoebe how to enforce the rules a little too well. / As Harold prepares for his Bar Mitzvah, he becomes increasingly nervous about whether he can face the responsibilities of being an active member of the Jewish faith.

Arnold and Gerald are so desperate to bowl in an upcoming tournament, they recruit their old basketball coach, Coach Wittenbergh, who quickly alienates the team with his overbearing demands. / Arnold and Gerald go on a ghost hunt through the boarding house, trying to uncover the mystery of Four-Eyed Jack.

After happening upon a snotty rich kid named, Rex, who is legendary for winning the annual toy boat race, Arnold and Gerald decide to enter the race. / Fed up with Principal Wartz's budget cuts, the teachers decide to go out on strike.

It's Valentine's Day and Arnold must navigate his way between two dinner dates at French restaurants directly across the street from each other.

Arnold designs a fantastic float for the City Day Parade, but the school has no money to build it. / When a legendary musical duo Dino Spumoni and his partner, Don, have a falling out, they each move into the boarding house in hopes of getting back to their musical roots.