Back in the past, Phineas 2 finished explaining what had happened.
"So when I tackled Doof, I made sure to activate his explosive," he said "with any luck, it should've destroyed the time machine."
"Quick thinking little brother," an impressed Candace 2 replied "that thing was too dangerous to remain in Doof's hands."
"Which means he'll never be able to try and stop me from existing ever again," Phineas added.
"Unless he can rebuild it, but I doubt even he's that clever," Candace 2 replied "now come on, we've got one more loose end to deal with."
They headed back into the house, where she was quickly accosted by the younger Candace.
"Okay, you'd better give me an explanation of what's going on right now!" she yelled "there was a guy in a black coat, and the two of you were fighting, and you haven't babyproofed anything! Now spill it!"
Candace 2 said nothing but instead reached into her satchel and produced a small gas mask. "Are you paying attention to me?" the young Candace asked "and what's that for, Halloween?"
Candace 2 then reached in again and pulled out what resembled a small grenade, then tossed it at the girl's feet.
"That's it, I'm telling mom!" young Candace said, before the grenade emitted a green smoke. "MOM! These people are up to something and…they...gas…so tired…" and she promptly fell asleep.
"Knockout gas," Candace 2 explained, "when she comes to, she'll believe everything that happened here today was all a dream."
"That's convenient" Phineas replied.
"And it prevents any tears in the space-time continuum" Ferb added.
Just then, Linda, having heard her daughter, headed down the stairs.
"Is everything all right down here? I heard Candace yelling?"
"Everything's fine ma'am," Candace 2 replied "your daughter was just a little stressed from the thought of dealing with your impeding child, so she decided to take a nap."
"Oh that's nice," Linda commented "well, I won't wake her. Speaking of a nap, I should get back to mine. I'll let you get back to work."
"Of course," Candace 2 said, as she watched Linda go up the stairs. Once his mom had left, Phineas turned to the 2nd Dimension characters.
"Thanks so much for helping me, you guys," he said "if there's anything Ferb and I can ever do for you, don't hesitate to ask."
"Actually, there is one thing," Phineas 2 said, then approached his counterpart and whispered in his ear.
"A pink jumper, bow, & shoes, a white t-shirt & and a darker colored pink belt" Phineas replied.
"Thanks, our Isabella will be happy to know that," Phineas 2 replied.
"Oh man, I forgot, Isabella and the others are probably worried sick about us!" Phineas exclaimed "we need to get back right now!"
"Then let's get the time machine fired up and take you two home," Candace 2 said.
"Thanks again, for everything," Phineas said "this was fun, traveling through time and meeting my mom before I was born. Outside of the whole 'trying to protect my existence' thing."
"Happy to help," Phineas 2 replied, with Ferb 2 nodding in agreement.
"I'm just sorry we won't see you guys for a while," Phineas added.
"And I'm sorry that I have to do this," Candace 2 chimed in. Before Phineas or Ferb could react, she reached into her satchel and tossed two of the knockout gas grenades at them.
"Why?" Phineas asked, moments before he and Ferb succumbed to the gas.
"I really wish we didn't have to do that," Ferb 2 commented.
"Me too, but they can't be allowed to remember anything about our dimension, or what happened here today," Candace 2 explained "it's for their own protection; now, help me get them on the time machine."
Back in present-day Danville, Candace had placed a roast turkey she had gotten from the fridge on the ground.
"Oh great mysterious force, I offer you this turkey in hopes that you will return my brothers to me," she said.
"Oh brother," Isabella commented. Then she saw Baljeet heading towards her; "Baljeet, great, any news?"
"I am sorry, I searched all over the left side of town, as you asked, but I have found no sign of them. Perhaps Buford is having better luck."
"Well we can't give up!" Isabella told him, the desperation in her voice apparent "they can't just be gone, they can't!"
"I know you are worried about Phineas, but I'm sure he and Ferb are fine," Baljeet comforted her "those two have proven themselves many times to be quite resourceful."
"Yeah, you're right," Isabella sighed, "let's get a snack, I haven't eaten all day."
The two kids headed inside the house and found a pleasing sight; Phineas & Ferb sleeping peacefully on the couch.
"Phineas, Ferb, you're back!" Isabella exclaimed, running over and hugging the sleeping Phineas.
"Wait a minute, did we not check here earlier?" Baljeet wondered "how is it that they are here?"
What Baljeet didn't know was, after taking the time machine back to the museum, the 2nd Dimension crew returned to the Flynn-Fletcher house and deposited the sleeping brothers on the couch while everyone else was outside.
"Pleasant dreams you two," Phineas 2 said, watching them "I hope we'll meet again some day."
"Ditto," his brother added.
"All right Baljeet, activate the portal," Candace 2 said into a radio she produced from her bag; a green portal opened up in front of them and they stepped through it, leaving no trace they were ever there.
"What's all the shouting about? I'm trying to contact the mysterious force!" Candace said, wandering over, then noticing her brothers "it worked, the force listened to my pleas and returned my brothers!"
"Candace, I really don't think…" Isabella began , then stopped "yeah, I guess you're right."
"Oh, come here you two!" Candace said, hugging them both, which caused them to wake up.
"Whoa I just had the weirdest dream Ferb," Phineas said "there was this eyepatch guy who wanted to get rid of me, and there were these other versions of us, and we went back in time to stop him. Weird huh?"
"Actually, I had the same dream," Ferb replied.
"That's weird," Phineas mused "it's probably a coincidence though."
"Oh Phineas, we're so glad you're back," Isabella interrupted.
"Back? Did we go somewhere?"
"You said you were going to get a pair of the shoes you made and come over to my house, but you never showed," Isabella explained.
"I remember going to get the shoes, but the rest is a blank," Phineas told her "I guess I must have fallen asleep; I'm sorry Isabella."
"That doesn't make any…oh who cares, you're here and that's all that matters," Isabella said, hugging him again.
"Well, my work here is done," Candace said "perhaps now you kids will learn not to mock the mysterious force" she added as she walked off.
"Um, what's she talking about?" Phineas asked.
"Don't ask."
"Anyway, while I have you here, there's one thing I want to ask you Isabella," Phineas said.
"Of course, anything," she replied dreamily.
"Where are our all-purpose shoes?"
Isabella frowned "I don't know; Buford did come back here earlier, so he may have borrowed them."
"Well, I hope he's having fun with them."
At the local beach, Buford was indeed having fun, using the shoes to effortlessly walk on the water.
"Man these things are great," he commented "I really need to tell Dinner Bell what a good job he did."
"Hey look, that kid is walking on the water" one of the swimmers said.
"Must be all the oil" the other commented.
Meanwhile, back in the 2nd dimension, Doofenshmirtz 2 arrived back at his headquarters and was greeted by that dimension's version of Carl.
"Good afternoon sir, how was your trip back in time?" he asked.
"Terrible," Doof 2 explained "the resistance kept me from getting my revenge and the time machine is destroyed. I mean, I could try to fix it, but I don't even think my genius could rebuild something like that."
"I'm sorry to hear that sir," Carl 2 told him "but I do have some good news; I've received word that another Goozim is being shipped here as we speak."
"Oh that is good news," Doof 2 replied, happily "and how are things going concerning 'Project Borg?'"
"Um…well," Carl 2 replied nervously "we have the technology in place, but we don't have any test subjects to use as of now."
"Well I suggest you find one," Doof 2 said, grabbing the intern by his jacket "otherwise, you'll have the pleasure of trying out the project yourself!"
"Wait, wait! I think there might be someone we can use," Carl 2 said franticly.
"Glad to hear it," Doof 2 replied, putting him down "get to work on it and inform me how it goes."
"As you wish sir" Carl 2 said, saluting, then watching as his master walked off.