Hillary The Helicopter

Hillary The Helicopter
This is the nineteenth episode of the fourth season

Trivia

 * This episode marks Harold's first lead role in the series
 * Hillary and Harold are revealed to be built by Scott Larson's cousin Michael Larson
 * Phineas, Mike, Candace, Nora and Ferb are seen skipping School to go hang out near Glennock. The kids skipping school would happen another three times in the season
 * Mike, Bert and Frank's quarrel over who will take the wool is a reference to