Full Moon: Harold, Sid and Stinky moon Principal Wartz, but Arnold is blamed, even though he was just an innocent bystander. Student Teacher: Helga's sister Olga comes ho ...

Arnold tells Grandpa he's tired of dealing with Helga's nonsense. Grandpa tells Arnold a story about a girl he had to deal with when he was a kid. / Arnold is in charge o ...

Arnold tells Grandpa he's tired of dealing with Helga's nonsense. Grandpa tells Arnold a story about a girl he had to deal with when he was a kid. / Arnold is in charge o ...

Arnold tells Grandpa he's tired of dealing with Helga's nonsense. Grandpa tells Arnold a story about a girl he had to deal with when he was a kid. / Arnold is in charge o ...

Arnold tells Grandpa he's tired of dealing with Helga's nonsense. Grandpa tells Arnold a story about a girl he had to deal with when he was a kid. / Arnold is in charge o ...

Arnold tells Grandpa he's tired of dealing with Helga's nonsense. Grandpa tells Arnold a story about a girl he had to deal with when he was a kid. / Arnold is in charge o ...

Crabby Author: Arnold is eager to do a book report, and decides to do it on his favorite author, Agatha Caulfield, who turns out to be the opposite of who Arnold thought ...

Crabby Author: Arnold is eager to do a book report, and decides to do it on his favorite author, Agatha Caulfield, who turns out to be the opposite of who Arnold thought ...

Crabby Author: Arnold is eager to do a book report, and decides to do it on his favorite author, Agatha Caulfield, who turns out to be the opposite of who Arnold thought ...

Crabby Author: Arnold is eager to do a book report, and decides to do it on his favorite author, Agatha Caulfield, who turns out to be the opposite of who Arnold thought ...

Crabby Author: Arnold is eager to do a book report, and decides to do it on his favorite author, Agatha Caulfield, who turns out to be the opposite of who Arnold thought ...

Phoebe agrees to take a dive so that Helga can win a competition, but she comes to regret her decision. / The boys engage in a recreation of a historical battle, only thi ...

Phoebe agrees to take a dive so that Helga can win a competition, but she comes to regret her decision. / The boys engage in a recreation of a historical battle, only thi ...

Phoebe agrees to take a dive so that Helga can win a competition, but she comes to regret her decision. / The boys engage in a recreation of a historical battle, only thi ...

Phoebe agrees to take a dive so that Helga can win a competition, but she comes to regret her decision. / The boys engage in a recreation of a historical battle, only thi ...

Helga's Show: Helga performs a stand-up comedy routine at P.S. 118, but when she starts imitating her classmates, they get angry at her and start ignoring her. She sees w ...

Helga's Show: Helga performs a stand-up comedy routine at P.S. 118, but when she starts imitating her classmates, they get angry at her and start ignoring her. She sees w ...

Helga's Show: Helga performs a stand-up comedy routine at P.S. 118, but when she starts imitating her classmates, they get angry at her and start ignoring her. She sees w ...

Phoebe agrees to take a dive so that Helga can win a competition, but she comes to regret her decision. / The boys engage in a recreation of a historical battle, only thi ...

Helga's Show: Helga performs a stand-up comedy routine at P.S. 118, but when she starts imitating her classmates, they get angry at her and start ignoring her. She sees w ...

Helga's Show: Helga performs a stand-up comedy routine at P.S. 118, but when she starts imitating her classmates, they get angry at her and start ignoring her. She sees w ...

Arnold is fed up with the bickering amongst the boarders and sets out to find the true meaning of the holiday. ...

All the kids are paired with adults with interesting jobs except Arnold, who is forced to spend time with the Jolly Olly Man. / Harold believes it's his life's calling to ...

Curly Snaps: Curly's dream is to become the Ball Monitor, but when that duty is mistakenly handed to Sid, Curly snaps, steals the school's kickballs and locks himself in ...

Arnold lends Sid his room for one evening, but the arrangement backfires when Sid keeps on borrowing the room. / Helga and Patty (the big girl) face off. ...

Casa Paradiso: Tired of the boarders' complaints and snarkiness, Grandpa plans to sell the boarding house and move to a tropical resort with Arnold and Grandma. Will Arno ...

Arnold and Gerald catch a suspicious man on film and they follow him clue-to-clue.In an effort to win a class poetry contest, Phoebe copies a poem from a book. Thereafter ...

When Timberly's doll is kidnapped, Gerald and Arnold track it down. A perfect new classmate is tormented by Helga and the other girls, but is eventually accepted. ...

Monkey Business: Helga believes she has contacted a deadly disease after learning about it in class. Big Caesar: Arnold and Gerald try to catch Big Caesar, a prehistoric ...

AKA - Trash Can Day, Arnold and Gerald must get through the traditional day of hazing 4th graders. After EugeneÃ+s pet fish is accidentally killed by ArnoldÃ+s yo-y ...

Helga's Love Potion: Helga drinks a potion to lose all feelings for Arnold. Gerald's Secret: Gerald confesses to Arnold that he never learned how to ride a bike, and Arno ...

Save the Tree: Arnold and the gang must stop Big Bob from chopping down the oldest tree in town. New Teacher: After the kids scare away their new, sensitive teacher, they ...