On the inevitable 104th day of vacation, the season is coming to a close and it’s Candace’s last chance to bust her brothers; who build huge playground equipment for the finale of summer. She is quickly foiled, but when she goes to return a DVD to Vanessa and finds Dr. Doofenshmirtz’s Do-Over-Inator, she finds an opportunity to redo the day, which results in other consequences like rips in the space-time continuum, the shortening of days and the disappearance of her brothers.
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Candace's Last Chance
Plans for the last day/Mission briefing
Doofenshmirtz's (not so) good morning
The usual flaw
The Do-Over Inator
Doof sees his Do-Over-Inator as a chance to defeat Perry once and for all, much to Vanessa's annoyance.
The second do-over fails
Yet another chance
Doofenshmirtz, the first Tri-Governor
Doofenshmirtz putting up his final and ultimate series of traps (with the help from Norm)
Norm about to hand Doof a box of angry weasels
Doof and Norm watch as Perry goes through every trap that they've planted.
Doof is delighted that he has finally trapped Perry (offscreen) for realsies this time.
Doof telling Vanessa to wait for a while as he finally trapped Perry
Doof fires his Tri-Governor-inator.
The inator finally builds a Tri-Governor's Mansion on top of City Hall, much to Doof's delight.
Doofenshmirtz puts up a voting booth for the upcoming election.
No spoons nor capri pants
Candace tries to inform about the existences of spoons and tigers (to no avail).
Linda is wearing shorts instead of her usual Capri pants.
Doofenshmirtz finally wins
Doofenshmirtz states that's he ready to talk with Vanessa about her intent to move out.
Vanessa is surprised to see that her father knows about her intent to move out.
Doof convinces Vanessa to watch the news about the election for Tri-Governor.
Doofenshmirtz shows Vanessa a news report about the election, which Roger is addressing as he is about to announce the final results to the public.
Roger is shocked to learn that Doofenshmirtz has won the election since he's the sole candidate.
Doofenshmirtz is delighted that he finally won while Vanessa remains unimpressed.
Doof tells Vanessa to pack up her stuff so that they can move to the Tri-Governor's Mansion.
A time rift sucks up Doof's Do-Over-Inator, much to his annoyance.
Having moved into the Tri-Governor's Mansion, Doofenshmirtz gloats over his greatest triumph, much to Vanessa's annoyance.
Phineas and Ferb disappear
Candace watches in horror as Phineas and Ferb are sucked into a time rift.
Candace tells Linda what happened to the boys.
Due to the effects of the time rifts, Linda doesn't even remember who 'Phineas' and 'Ferb' are.
Candace is shocked to learn that Linda doesn't remember about the boys at all.
Linda is still confused over Candace's explanation about what's happening.
Vanessa's new room
Vanessa somewhat admires her new suite as First Daughter of the Tri-State Area.
Melanie arrives to tell Doof that his schedule as Tri-Governor is heavy, which he needs to take action on.
Doof tells Vanessa that he has to leave for work as Tri-Governor until he gets a break.
Vanessa realizes that she will have to wait until her father returns from work.
Candace convinces her friends
Doofenshmirtz's new office
Doofenshmirtz is ready to start his job in his new office.
An angry Perry arrives to Doof's office via jetpack.
Doof reveals to an arriving Perry that he has put a law forbidding anyone to thwart the Tri-Governor for any reasons whatsoever.
Perry is upset to learn that he has finally lost against Doof after reading the legislation papers.
Doof orders Perry to leave, as he doesn't want to be bothered while doing his new job.
Perry is about to leave, but not before he personally begs Doof to reconsider (to no avail).
"No, no. Don't give me the puppy dog eyes. You're gonna make me cry."
Doof is confronted by angry Roger on the intercom for stealing his secretary Melanie.
Doof taunts Roger back by saying that he's his new boss.
Another time rift sucks up Doof's snowglobe, much to his surprise.
Doof realizes in horror that even with his machine gone, the time rifts are still erasing a lot of things from existence.
Wild fluctuations in the space-time continuum
Monogram regretfully informs Perry that since Doof has finally won, Perry himself is suspended from work until Doof's term as Tri-Governor is over.
Sitting on a windowsill, Vanessa spots Perry moping over his impending fate.
Vanessa reveals her true intent to move out: she got accepted into OWCA's internship program and that she can't join it if she's living with her father.
Vanessa explains to Perry that she will tell her father about the internship and try to convince him to see things her way.
Vanessa confesses to Doof about the OWCA internship and that she still have to move out.
Vanessa tells Doof that despite his recent success, it doesn't change the fact that he just built his inators to prove to everyone that he's evil.
Vanessa also proclaims to Doof that he's not really evil, and that he only acts evil out of obligation to his miserable childhood.
Vanessa asks Doof if he's really happy with his new job as Tri-Governor or not.
Doof realizes that despite his success in taking over the Tri-State Area, he is quite unhappy with it.
Vanessa suggests to her father to turn in a new leaf.
Doof confesses to Vanessa that he knows about the O.W.C.A. internship and that he's turning over a new leaf for her sake, much to Vanessa's surprise.
Time Loop explanation
Finishing the Time-Straighten-Out-inator
The time loop is finished
Danny Jacob confirming the special.
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