After a few moments, everyone headed back to the living room to report their findings.

"No sign of Doof in the basement," Phineas said "and Ferb and I checked everywhere. Of course, we have a lot less stuff down there now."

"Did your perimeter scan turn up anything?" Candace 2 asked her brother. Ferb 2 simply nodded no in reply.

"This doesn't make any sense," the teenager mused "Doofenshmirtz clearly wants to make sure Phineas isn't born, yet he hasn't done anything to make that happen yet. Maybe he knows something we don't."

While the other dimension teen pondered Doof's master plan, upstairs, the younger Candace was tending to her pregnant mother.

"Candace, did I hear you shouting earlier?" Linda asked.

"Yeah, that baby proofer lady was messing with Mr. Miggins," young Candace explained "she told me she had a bear just like him, weird huh?"

"Some teenagers keep stuffed animals they were attached to as kids, it's not so unusual," Linda replied "anyway, I'm ready for a nap, but I could use some tea first. Would you go downstairs and bring some up?"

"Sure mom," young Candace said, as she left her mom's room and headed for the stairs. "Jeez, Mr. Miggins, mom expects me to do everything for her!" she whined "I hope it won't be like this after the baby is born."

Young Candace passed by the others as she made her way into the kitchen. She noticed the cup of tea on the counter, picked it up, and headed back towards the stairs.

"You know, you guys stand around a lot instead of doing actual work," she said to the gathered time travelers.

"Sorry, we're just deciding what to cover the banisters with," Phineas explained "you know, so the baby won't bump its' head."

"Oh, okay," young Candace replied "oh, and keep it down; my mom's going to sleep after I bring her this tea" she added, before heading up the stairs again.

"Good work with the bluff Phineas," Candace 2 said, impressed "now we can continue our search…did she say tea?"

"That's right."

"Of course! Why didn't I think of it sooner?" Candace 2 asked "Phineas, get upstairs, and whatever you do, do not let her drink that tea."

"Can do sis," Phineas 2 saluted, quickly rushing up the stairs.

"Here you are mom," young Candace said, as she handed her mom the tea cup. Linda raised it to her lips, but before she could take one sip, Phineas 2 rushed into the room.

"Wait!" he said "don't drink that!"

"Why not?"

"It's been sitting out on the counter all day, it's probably cold," Phineas 2 explained.

"Ooh good point," Linda replied "cold tea would not be good at all."

"How about I get rid of that one for you, and bring you up a fresh one?" Phineas 2 asked.

"Well, aren't you a nice young lad," Linda said "but this really doesn't seem like part of your job description."

"We like to go the extra mile," Phineas 2 explained

"All right then, but don't go charging me for this on the bill," Linda told him, handing him the tea cup. After Phineas 2 left, she yawned "ooh, maybe I should just take my nap now and have the tea later," she commented "Candace, be a dear and keep an eye on things for mommy, okay?"

"Sure mom," young Candace replied; after her mom closed her eyes, she turned to her bear. "There's something suspicious about those guys Mr. Miggins, and I'm gonna find out what."

Meanwhile, Phineas 2 reported to his sister with the cup of poisoned tea.

"Mission accomplished sis," he said proudly.

"Not yet it isn't," she replied "this is proof that Doofenshmirtz is here somewhere." She reached into her satchel and pulled out what appeared to Phineas to be a pen. Pushing a button on the side of it, however, expanded it into a quarterstaff.

"Show yourself Doofenshmirtz, I know you're here!" she said, but there was no response. "I don't get it, he has to be here, he must have put poison in the tea."

"Maybe he did it earlier, then left?" Phineas suggested.

"No, he'd want to stay and watch his plans unfold," Candace 2 told him "but how could we have missed him, it's not like he could just disappear" the teenager added, before pausing suddenly.

"What?" Phineas asked, curiously; the girl said nothing and headed for the stairwell.

"She's acting weird today, huh Ferb?" Phineas asked. Ferb just shrugged in reply.

Candace 2 made her way up the stairs and threw open the door to the master bedroom. Linda was lying there with her eyes closed, and above her, the glowing green blade of a lazer sword was about to come down. Candace 2 ran into the room and threw herself a few feet from where she could see the sword; her instincts had been correct, as she felt herself collide with something, or rather, someone. The lazer sword flew to another side of the room, while its' owner suddenly materialized.

"How did you know I'd be up here?" Doof 2 asked.

"You wanted to make sure Phineas was never born, and the only way to do that was to get rid of his mom," Candace 2 explained "when my younger self mentioned tea, I realized you'd try to poison it to achieve your goal. But when we stopped that, I knew you had to still be around here, with a backup plan; it made no sense to me how you could be here without any of us seeing you. And then it hit me…"

"Stealth technology," Doof 2 finished for her "that's right, I designed a device and built it into my jacket. I'm thinking of mass producing them and putting them in my Normbots; imagine how more difficult they'll be to fight if you can't see them."

"It's over Doofenshmirtz," Candace 2 said, tightly clutching her quarterstaff "you've lost."

"Not yet I haven't," Doof 2 "after all, you can't stop what you can't see"; so saying, he activated his stealth device.

Candace 2 jumped at where she last saw him, but only hit floor. "Ooh, too bad, my turn," he said, retrieving his lazer sword; he tried to bring it down on her, but she rolled out of the way.

"As long as you have that sword, I know exactly where you are," Candace 2 told him.

"Good point," Doof 2 pointed out, turning off the sword. Candace 2 lunged at him, but missed and hit the floor again, dropping her staff in the process. She went to retrieve it, and saw it floating in mid-air.

"Mine now," Doof 2 said, and, before she could react, slammed it into her gut. Candace 2 doubled over in pain, as Doof 2 hit her in the back with her staff. He then yanked her up by the hair and tossed her into the corner.

"This has been fun, but I have a kid's existence to destroy," he said, raising the sword above Linda once again. Candace 2 tried to get up, but she was still out of breath from the gut blow.

"Hey you!" Phineas 2 called from the doorway; though the young boy couldn't see it 'because he was invisible, Doof 2 turned to look at him. "It's tea time!"

Phineas 2 ran in and tossed the cup of tea towards the lazer sword; as luck would have it, he hit Doof 2 and shorted out his stealth device.

"Ah man, you're paying for my dry cleaning kid!" Doof 2 said, as he shook the tea off himself "oh and also, I'm going to make you pay for doing that" he added, raising aloft his lazer sword, while Phineas 2 tried to shield himself from the blow.

However, Candace 2 had made it to her feet and planted her quarterstaff in the ground. Grabbing it with both hands, she swung herself around and slammed her legs into Doof 2, sending him out the door of the room.

"'It's tea time?'" she asked, after walking over to her brother.

"I was trying to go for one of those cool lines, like they say in action movies," Phineas 2 explained.

"Well you did good little brother," Candace 2 replied, tussling his hair "come on, we need to stop Doofenshmirtz."

She ran out of the room, with Phineas 2 taking the time to note the sleeping Linda. "I can't believe she slept through all of this," he commented.

Meanwhile, Doofenshmirtz 2 fled downstairs, but found Phineas, Ferb, & Ferb 2 waiting for him.

"Oh no, you're not going anywhere," Phineas said defiantly.

"Uh hello, you're kids; what are you going to do, hit me with toys?" Doof 2 asked.

"No, but I will," Doof 2 turned around in time to see Candace 2's foot collide with him, knocking him off the stairs and into the living room.

"You took my childhood from me," she said "I won't let you take Phineas's. This ends here."

"Yeah, well fine by me," Doof 2, said pulling out his lazer sword and charging towards her.

The two then began a battle throughout the living room, with Candace 2 dodging the lazer sword blows and Doof 2 evading the quarterstaff.

"Hey sis, can we do anything to help?" Phineas 2 asked.

"Yeah, don't distract me while I'm fighting!" she yelled back, narrowly avoiding a lazer sword swipe.

She swung her quarterstaff, but Doof 2 ducked it and sent another swipe towards her, this one cutting a rip in her shirt. Candace 2 then began swinging her staff wildly, knocking over any furniture in her way, while doing her best to avoid the sword blows.

"Hey, what's all the noise down here?" young Candace asked, as she headed down the stairs "I thought I said to keep…" she then noticed the fight between the two "if anyone needs me, I'll be in my room," she added, quickly rushing back upstairs.

Candace 2 swung her staff again, but this time Doof 2 used his sword to slice it in two. She then grabbed both pieces and started wielding them, using one to knock the sword from his hands.

"It's over."

"For you maybe," Doof 2 said, grabbing her arm and forcing her to release one of the staff pieces; he then hit her in the chest with it, causing her to drop the other and grab her chest to regain her breath. When she did so, Doof kicked her unto the couch, regained his fallen sword, and pointed the blade at her chin.

"Candace!" Phineas 2 yelled, and tried to run forward to help her, with his brother and Ferb holding him back.

"Stay back kid, or she's done for," Doof 2 told him "it's funny, you guys found a time machine and came back here to stop me, but you didn't realize it was futile. Even if you defeat me, I'll just go back in time a few hours or so earlier and finish things then. And after I do, when everything is back as it should be, now that I know what nuisances you'll become, I'll turn you into boyborgs, and the first ever girlborg. What do you think of that?"

"Borg this!" Candace 2 shouted; reaching into her satchel she produced something and tossed it to the ground, where it emitted a blinding flash.

"Ahh my good eye!" Doof 2 yelled, dropping his sword, allowing Candace 2 to regain her composure and kick him into the wall. She then grabbed both pieces of her quarterstaff and whirled them around.

"Yay other-dimension Candace!" Phineas cheered.

"Like I said earlier, it's over," she explained "and now, you're going back to prison to pay for your crimes."

"Yeah, I don't like that option," Doof 2 said, reaching into his coat "so I've got my own suggestion," he added, pulling out a baseball shaped device.

"Um, what is that?" Phineas asked.

"I call it a portable detonator," Doof 2 explained "the name is pretty self-explanatory, but this little baby has enough power to wipe this whole house off the face of the map. All I need to do is press one little button to activate it."

"Don't be a fool Doofenshmirtz," Candace 2 "you know that if that thing goes off, you'll go up with it. I know even you aren't that obsessed with revenge that you're willing to sacrifice yourself to get it."

"You know me well," Doof 2 said "no, this is my ticket out of here; you won't attack me so long as I have it. So I'm just gonna stroll out of here, get to the time machine, go back, say a half hour, and watch as triangle boy ceases to be."

"That's not happening," Candace 2 told him, taking a step forward.

"Uh uh, you take one step closer and this whole place goes up," Doof 2 explained "sure I go, but at least all of you do too."

"He's right," Candace 2 said "we have no choice."

"We can't just let him get away!" Phineas chimed in.

"Look at it this way kid, you get to live for another few minutes, tops," Doof 2 said, backing up to the door "now nobody follow me, or you know what'll happen…"

"Leave my mom alone, you evil guy!" came the voice of young Candace. Before anyone could stop her, the young redhead tackled Doof 2, causing the detonator to fly from his hands.

"Get it, quick!" Candace 2 shouted.

Phineas 2 quickly dove across the floor to where the detonator was coming down. "It's a pop fly, and Flynn goes for it," he said, managing to catch it before it hit the ground "and it's good!"

"Whew!" Candace 2 sighed in relief before facing her younger self "and you; what the heck were you thinking? If that thing activated, we could've all been blown to atoms!"

"Don't yell at me!" young Candace said "I heard what you said. Who was that guy, and why was he trying to kill my mom?"

"That's none of your business."

"You better tell me, or I'm calling the police," young Candace said.

"Uh sis, Doof is escaping" Phineas 2 told her.

"Stay here, we're not done with this conversation yet," Candace 2 instructed the younger Candace, before rushing out the door.

"You think you're so smart? Well not as smart as me," Doof 2 said, as he headed for his time machine "'cause I realized I can go whenever I want, so I'm going to go back to before man was civilized, and civilize them myself; into worshipping me. You ever heard of Doofasaurs? Well you're about to."

"Oh no you don't!" Phineas 2 said, tripping the evil genius. He started struggling with him, but Doof 2 quickly tossed him off.

"Stop him, quick!" Candace 2 shouted, but Doof 2 produced a gas bomb from his coat and tossed it at them, blinding them.

"I just need to make a stop to pick up a couple of Normbots, and this world is as good as mine," he cackled, getting to his time machine. He activated a portable Other-Dimensionator that he had built unto it, and then geared up the machine.

"Get ready to learn all about the Doofasaurus Rex. Yeah, that's what I'm calling it," he said.

The gas finally cleared, but only long enough for everyone to watch as Doof 2 and his time machine disappeared into the portal.

"Quick, to our time machine!" Candace 2 ordered "if we hurry, we can beat him there before he gets his army assembled and…"

"Relax sis," Phineas 2 interrupted.

"Relax? Did you not just hear Doofenshmirtz?" she asked him "if we don't do something, this whole dimension could be his!"

"Something tells me he won't be getting away with that," Phineas 2 explained.

"What do you mean?"

Back in the 2nd dimension, the time machine arrived back in Doof 2's lair.

"Now I'll just collect an army of my robots, and then Doofhistoric times will become a reality! Nah, I don't like that, I'll come up with a different name," he said.

Suddenly, he heard a beeping sound. "What's that? Did I leave my beeper on?" he asked, rummaging through his pockets. "Wait a second, I don't have a beeper."

Then he pulled the source of the beeping from his pockets. "Oh, it was just my portable detonator," he said, before doing a double take "my portable detonator!"

He tossed it aside and ducked for cover; unfortunately, it landed near the time machine, exploding and shattering it into tiny bits.

"Thwarted by one of my own evil devices," he commented "I really should've seen this coming."

In the final chapter, our heroes prepare to head home, but there's one more thing they must do.