Phineas and Ferb find a capsule that falls from the sky that they want to open. Meanwhile, Doofenshmirtz is kidnapped by a guy named Professor Mystery whose nemesis is also Peter the Panda.
Candace swearing to watch the two boys while listening to her music
A mysterious capsule has fallen into the backyard
The boys waiting for another object to fall to no avail
"I guess this is the only one."
Ferb tries to open the capsule but to no avail.
Monogram informing Perry that Doofenshmirtz has been missing for a long time
Perry feeling concerned for Doof
"You know, sometimes, I feel like he just come here to get his assignments."
Phineas breaking Dumpamir's third axe in an attempt to open the capsule
Baljeet feeling more motivated to open the capsule
Ferb does a Z-ray scan to find out what's inside the capsule
Unable to see anything through the capsule
Perry arrives to find Doof's building empty
Doofenshmirtz doing his blog in a flashback
Doof being attacked by the kidnapper
Doofenshmirtz blindfolded by the kidnapper
The kidnapper leaving footprints on the floor
The kidnapper stealing Doofenshmirtz's sandwich
Perry taking a closer look at the footprints
Too many pianos broken to open the capsule
An arriving Buford claiming that he knows how to open the capsule
Buford explained that he found a key that fell into his backyard when the capsule came by into scene
Carl explains that the molecules from the footprints leads to consumption of coffee in a rainy climate
Perry realizes that Doofenshmirtz has been taken to Seattle
A blindfolded Doof locked inside a small capsule, demanding an explanation
The hatch opens, revealing an old man inside
"I'm 'you' (Phineas) from the future!"
The gang is shocked by the man's words
Doofenshmirtz seeing an obsessive shrine to Peter the Panda
Doofenshmirtz looking on the other side to see the kidnapper
The kidnapper reveals himself
"It is I..... Professor Mystery."
Doofenshmirtz is not surprised by this
A confused Mystery wondering if Peter never mentioned him to Doof
Doofenshmirtz states that Peter cannot talk
"What's with all the silence? It's very off-putting."
"Mystery.... is my allure."
"Oh, this is gonna be a 'fun' conversation."
Phineas questions if the old man is really his future self
The old man explaining that a black hole is inside the capsule
The old man stating that the black hole will run out of control if the hamster slows down
The fears are made worse when...
"Stop telling people that you're them from the future!"
An old woman named Denise arrives, greeting the kids
Denise reminding her husband (whose name is Bernie) of his blood pressure
The hamster starting to slow down
Doofenshmirtz demanding to know why Mystery kidnapped him
Mystery revealing that he is Peter's nemesis
Mystery has invented his own -inator, but refuses to tell what it does
Mystery explains that he never talks to Peter, feeling that it would ruin his 'mystery allure' thing
Doofenshmirtz pointing out that Peter has to know what Mystery is up to, calling it common courtesy
Doofenshmirtz then wonders if Mystery has ever told anything to Peter
Mystery is silent on the matter, revealing that he has never talked to Peter before
Doofenshmirtz realizing that Mystery has a lack of communication
The black hole increasing in strength
Bernie attempting to warn Phineas about how to stop the black hole
Bernie gets sucked inside the black hole, along with Denise
The black hole growing more bigger
The gang calling out Candace for help
Candace is shocked to see the black hole
Candace attempts to warn Linda of the event
"You're the last person I'm ever going to take advice, you nemesis stealer!"
"Even with musical accompaniment, you JUST don't get it!!"
Doofenshmirtz points out that Mystery is to blame for his problems with Peter, not himself.
Mystery firing up his inator
Mystery aiming the inator at Doof
Mystery awaiting for revenge
Doofenshmirtz becoming more annoyed by this
Doofenshmirtz and Mystery hearing a blow torch
Peter arriving to confront Mystery
Peter punching Mystery again
"What did he give you that I couldn't give you?!"
"An evil monologue for one thing!"
Doofenshmirtz is finally fed up, demanding Mystery to tell Peter what his inator does
Mystery finally confesses that it's an Unexist-inator, designed to erase anything from existence
Doofenshmirtz is now worried that he will be erased from existence
Perry arriving to the rescue
Perry lands on the inator
Perry moving the ray away from Doof
The inator firing up a ray through the ceiling
The ray being reflected from the tower to an unknown location
The black hole growing more stronger, threatening Danville
The ray hits the capsule, erasing it and the black hole from existence
The gang (and the rest of the world) is now safe
Dragging Linda out, Candace is confused to see that the black hole is gone
In a coffee shop, Mystery finally confesses to Peter that he lost his parents to a black hole
Mystery explaining that his loss of his parents led to doing evil and creating the Unexist-inator
An arriving Bernie and Denise (having survived the black hole) revealed to be Mystery's long-lost parents
Bernie is surprised that his son has a panda bear for a nemesis
Doofenshirmitz and Perry leaving back to Danville in peace
Phineas and Ferb invite their father, who is a polar bear, for snacks
The three leaving as another Phineas (the original one) watches through a hole from another dimension
Phineas and Ferb watching their alternate selves before the hole closes
They both decide that the two boys can't be themselves because the other Phineas had an extra white stripe in his shirt, and that their father is a polar bear.