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Full Moon

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Episode of Hey Arnold!
Full Moon
Full Moon
Season 4, Episode 63a
Written by: Steve Viksten
Air date: March 10, 1999
IMDb •
Don Del Grande's

Full Moon is an episode in the Hey Arnold! TV Series.


Arnold is walking to class when he sees Harold, Sid, and Stinky at the corner. They plan to moon Principal Wartz. They ask Arnold if he wants to join in, but he thinks it's not a good idea. The three tell him he just doesn't have any guts.

Wartz leaves his office and starts walking toward them. Harold, Stinky and Sid wear masks to disguise themselves. Wartz walks by and they unbuckle and unzip their jeans fully exposing their butts. Wartz puts on his glasses and is shocked. The boys run away laughing while Wartz tries to stop them. However, they get away and Wartz takes Arnold to his office.

Arnold says he didn't do anything, but Wartz says he did see who did it. Arnold agrees. Wartz asks Arnold who did it, but Arnold won't tell because he's not a snitch. Wartz assigns Arnold detention for failure to cooperate. Arnold leaves while Wartz makes a phone call. Sid, Harold, and Stinky arrive and ask Arnold if he snitched. Arnold says he didn't, which the boys are happy about. Arnold tells them he has detention, but Stinky says he didn't even do anything.

Sid thinks about telling, but Harold says Arnold getting caught is his fault. Arnold goes through several punishments, but still refuses to tell who did it. Harold asks why Arnold didn't admit, and he says because he's not a snitch. That night Harold is sleeping but is having guilt. The next day, Wartz prepares to mark Arnold's permanent record, when suddenly Harold, Sid, & Stinky burst in admitting in tears they were the culprits and Arnold had nothing to do with it.

Wartz lets Arnold off the hook (for now). The boys say Arnold has guts. They plan on pulling another prank and try talking Arnold into it.


  • This was the first episode produced using digital ink and paint instead of cel animation.
  • This episode takes place during the month of April.
  • This is the second time Arnold gets detention. The first was in the episode "Girl Trouble".
  • Principal Wartz has a poster advertising the Woodstock Festival in his office.
  • In this episode, we find out that Harold has a mole on his right butt cheek! We discover this when we get a very quick glance of his butt when he moons Principal Wartz.
  • Wartz’s reputation as a snitch in elementary school followed him through high school and college; he didn’t even have a date until he was 23 years-old.
  • The episode is ranked #75 during "Top 100 Greatest Moments In Nicktoon History".

See also

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