Thaddeus and Thor - De Plane! De Plane!.Thaddeus and Thor: When Candace meets Mandy, the sister of a pair of brothers who also like to build ambitious projects, the two ultimately force their brothers to compete in building forts. Meanwhile at a family reunion, Dr. Doofenshmirtz tries to win a game of kickball with a robotic kicking leg.
De Plane! De Plane!: Phineas and Ferb build a passenger plane out of papier-mâché to beat the record of the longest wingspan held by the famous Spruce Goose. Meanwhile, at the pool party at Jeremy's house, Candace and Stacy see an Australian girl named Nicolette who seems to be trying to gain Jeremy's attention (Candace doesn't know that Nicolette is actually Jeremy's cousin), and Doofenshmirtz builds an evaporation machine out of recycled materials.