Snapped: Killer Couples (2013)

S4E29 Steampunx

Phineas and Ferb stumble upon a historic coin from the 1903 Danville World’s Fair, prompting their father, Lawrence, to share stories about the festival. He reminisces about the introduction of steam-powered inventions and recalls a group of kids, similar to them, who were eagerly getting ready for the exciting occasion.