Candace is training for the Father-Daughter picnic.
Lawrence is looking at past trophies, though they lost all those years.
Perry goes to his secret HQ as usual...
..but Lawrence sees the entrance...
...and goes through the tubes to his lair.
Lawrence learns Perry's a secret agent!
But Lawrence trips over a cord and falls into the memory eraser!
After getting Lawrence free, Carl explains the situation to Major Monogram.
He's built robotic replicas of the Flynn-Fletcher family in case a situation like this happened.
Doofenshmirtz shows off "Eulg", his latest creation.
Eulg takes things apart instead of sticking them together, as Doofenshmirtz demonstrates.
Perry is ordered to return to HQ.
While Carl restores Lawrence's memory...
...Perry will pilot the robot in his place.
The floating pep squad mobile.
Candace is worried that her father hasn't appeared yet.
Linda, however, is caught in a traffic jam.
The Lawrence robot shows up at the picnic.
"Let's get checked in, dad!"
Phineas provides commentary on the events from the blimp.
They even skywrite in the sky for her!
Candace telling "Dad" Phineas and Ferb are driving a blimp.
sees Perry putting away the pies. ("Eewww!")
Their balloon animal entry, which they lose on as it's not an animal.
Candace panics when she sees her "Dad" overheat.
Despite sweating from the robot overheating, Perry must continue his mission.
Perry cools down the robot after Candace hands it some water.
Candace and "Lawrence" doing the balloon toss.
Perry is informed that Lawrence's memory is fully restored.
They switch the fake Lawrence with the real one while Candace is distracted.
Balthazar sees Carl and Perry.
Candace tells him they're in second place.
Doof's target: The Adult Diaper Factory.
Five minutes from target.
But he accidentally spills some Eulg on his plane and it falls apart.
Phineas and Ferb start a wave.
Phineas starts the sack race.
When they slip up, Lawrence remembers the rhyme to get them in the rhythm.
The Fireside Girls get ready for their final cheer.
While Doof makes a safe landing...
The debris from the plane falls on Doof.
And a stray tack pops the blimp...
...causing the blimp to go out of control.
Bubblegum, bubblegum, running in the sack!
Hop to the finish and don't look back!
Candace and Lawrence win the sack race!
Linda congratulates them for winning.
They also win first place overall in the competitions!
"Didn't I see you somewhere before?"
"Carl! We gotta fire up the memory eraser again!"