Phineas, Ferb, Candace and Phineas' and Ferb's friends are visiting the trio's grandparents, Betty Jo and Clyde Flynn.

Meanwhile, Dr. Doofenshmirtz has a date which is interrupted by Perry the Platypus.
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!!Tropes found in this episode include:
* AlwaysIdenticalTwins: Betty Jo and her twin sister Lorraine. Lorraine lives in a closet and only comes out once a year when Betty Jo and Clyde want to prank someone.
* ArtisticLicenseMusic: Grandpa Clyde is seen playing the banjo during the song, however, the instrument that plays is actually a mandolin.
* AsideGlance: When Doof's date arrives, he asks Perry if he can pretend to be his pet and act like "a mindless animal". Perry ([[DramaticIrony who does this all the time in front of the Flynn-Fletchers]]) gives an unamused glance to the audience.
* BaitAndSwitchComment: Doofenshmirtz, as usual, describes Perry's presence as an "unexpected surprise". By "unexpected", he actually means "unexpected" this time.
* BigfootSasquatchAndYeti: The Bigfoot is described as a [[ToServeMan man-eating]] monster that wanders the woods.
* BringMyBrownPants: When Buford announces his plan to take a nerd’s underwear, Baljeet offers his, which are “incredibly messy all of a sudden.”
* ByNoIMeanYes: [[AvertedTrope Averted.]] This is the first time where, by unexpected, Doofenshmirtz does mean unexpected.
* CoveredInKisses: At the end of the episode, Phineas sees that Perry is back. Picking him, he notices Perry's body is covered in red lipstick marks, which were clearly from Doof's date.
* CutenessProximity: Doofenshmirtz's date is distracted by Perry's cuteness, to the point where she almost completely ignores Doofenshmirtz. By the end of the episode, Perry returns to the Flynn-Fletchers, his body covered with several lipstick marks.
* EarlyInstallmentWeirdness: This is the only episode in which the Flynn-Fletchers drive a van. All other episodes has them driving Mom's station wagon.
* NoNameGiven: Doof's date is never referred to by name.
* NoYou: Candace reaches a breaking point after Phineas' Bigfoot prank. Phineas says it was just a joke, but Candace says, "No, ''you're'' a joke, Phineas!"
* NoodleIncident:
-->'''Doofenshmirtz:''' It's not the worst date I've ever had. There was that one that kept stabbing me with a fork.
* OohMeAccentsSlipping: Carolina Rhea's Canadian accent comes through when Betty Jo says, "Soorry, Candace."
* PoorCommunicationKills: Grandpa says to Ferb "Still a man of few words, I see"; Ferb tries to say otherwise, but Grandpa interrupts him before he can finish.
* RecordNeedleScratch: One of these occurs during the "by unexpected, I mean unexpected" gag.
* ScaryFlashlightFace: Baljeet tries this while telling his scary story, but it fails to scare the other kids. Phineas also does it when he tells his story (to better effect).
* SpecialGuest: Creator/SandraOh of ''Series/GreysAnatomy'' fame voices Doof's unnamed girlfriend who takes a liking to Perry.
* ThatRemindsMeOfASong: Grandpa, before performing "He's Bigfoot":
-->'''Grandpa:''' If my memory serves, I think there was a song about it.\\
'''Isabella:''' Really? Do you remember any of it?\\
''Cut to Grandpa strumming a banjo''[[note]]Which, for some reason, sounds like a mandolin[[/note]]\\
'''Phineas:''' He remembers.
* UnderwearFlag: Discussed. Buford says his plans for camp are to "find a nerd, take his underpants, and run them up the flagpole". Phineas tells him the camp probably doesn't have a flagpole, so he settles for taking the underpants.
-->'''Baljeet:''' [[BringMyBrownPants You may have my underpants. They just got very messy all of a sudden.]]
* WarningSong: "He's Bigfoot," which is about how Bigfoot eats people.

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