Arnold gets a date with both Ruth (The girl he likes) and Cecile (his pen pal, who's actually Helga in disguise), but later the real Cecile shows up.

Arnold gives an amateur magic show behind the boarding house and, for his big number, makes Helga actually disappear; Arnold hits Harold with a baseball, so Harold promises Arnold that he'll beat him the next day.

Arnold defends Eugene in student court; The kids try to get in the book of world records so much that they would do anything.

Arnold must find a way to recover his pig pet Abner after he runs away.; Arnold loses Grandpa's watch inside the sewers.

Helga plots sibling sabotage; Arnold and Gerald must turn off all the lights in the city if they want to see Sally's Comet.

Arnold and Helga compete in a spelling bee; When Arnold's pigeon gets sick, he takes it to "Pigeon Man", a person surrounded by pigeons who lives on a rooftop.

Arnold tutors the class bully; A friend stays overnight.

Everyone decides to take the subway home, but disaster strikes when they find themselves trapped in it; Arnold convinces the gang to go to Elk Island, where, unknown to them, two men are plotting a counterfeit coin scheme.

Arnold and the gang play on a basketball team, but their coach tells them to only throw the ball to one person, his son, Tucker; An older cool guy befriends Arnold.

Arnold tries to find Mr. Hyunh's daughter (who was separated from him during the final days of the Vietnam War) as he carries out his duty as Mr. Hyunh's secret Santa. Meanwhile, Helga must choose between a Christmas present for herself and the perfect gift for Arnold.

All of the borders get very curious to what is inside the very personal Mr. Smith's package; Oskar gets kicked out of Suzie's room, so Arnold tries to get them back together.

Arnold learns self-defense; Grandpa takes the boys camping.

Arnold attempts to do something that no other kid has done before - completing the entire list of a kid's perfect Saturday!; Grandpa tells the kids a spooky tale.

Helga ruins Arnold's romantic efforts; Arnold and friends decide to clear out a vacant lot to play baseball on, but the adults take over it, and use it for their own reasons.

Record heat sets all on edge; Snowy day.

Sixth-graders invite Arnold and Gerald to a dance; Arnold snags a home-run ball.

Helga gives herself a new look; Grandma is upset over the demolition of a theater.

Helga commandeers Arnold's hat; Fear makes a boy a bully.

Gerald finds Helga's journal; Arnold conspires to free a tortoise.

Actors Arnold and Gerald are stranded downtown dressed as fruit; Arnold wrecks Eugene's bike.