While the boys and their friends create hot air balloons and have a race, Candace is inspired by an engineer's attitude and decides to finally "give up" busting her brothers. Meanwhile, Doofenshmirtz finds a dodo egg and thinks it will be a fierce, rampaging monster when it hatches, only to discover the exact opposite.
Tropes in this episode:
- Broken Record: "Give up! Blah blah! Give up! Blah blah blah blah blah! Give up! Blah blah blah! Give up!"
- Impairment Shot: Linda's view of Phineas and Ferb's balloons placed directly behind their clothes on a rack, which lets her assume it's really them.
- No Peripheral Vision: Lampshaded; Linda says she needs contact lenses to help her see because she cannot see very well without them.
- Offscreen Teleportation: When Isabella sees Phineas trying to fix the loose steering wheel, he stops mid-sentence and looks back, and the camera pans to reveal Isabella somehow got into his balloon.
- Pun-Based Title: The title is a pun on the Monkees' hit, "Last Train to Clarksville".
- Status Quo Is God: In the end after helping the train get up Gearheart Summit, Candace decides she won't give up on busting her brothers having learned her lesson.