"So you guys are us from another dimension. You say that we saved your dimension once from a guy named Doofenshmirtz...and now say there may be a new enemy wanting to take over BOTH our dimensions?" Phineas said, trying to clarify everything.
"Pretty much." 2nd Candace said.
"And whoever did this somehow got to YOUR Isabella to kidnap OUR Isabella to take her place in THIS dimension?" He continued, looking at 2nd Isabella.
"Right," 2nd Candace answered again. They walk to 2nd Isabella.
"So what does OUR Candace have to do with this scheme?" He asked the tied-up girl.
"She was easy to manipulate," 2nd Isabella answered.
"HEY!" Candace shouted, insulted.
"What did you manipulate Candace to do?" He asked 2nd Isabella.
"Kidnap your pet, of course. She doesn't like him...plus we didn't want him to get in the way." She answered.
"What? Perry is a platypus. They don't do much..." Phineas gave a usual response.
"You'd be surprised," 2nd Isabella replied.
"So what exactly are you guys trying to do?" Phineas asked. Suddenly, she starts to tremble, like she's being electrocuted. When she stopped shaking, something appears on her head and falls off. Ferb quickly picks it up.
"Bug." Ferb said.
"So whoever did this knew what just happened..." Isabella realized. When 2nd Isabella came to...
"Huh? Where am I?" She sees two sets of people. "What's going on!? Why am I tied up!?"
"Looks like she's back to normal," 2nd Candace spoke, untying her. 2nd Isabella looks at her alternate dimensional twin.
"Wow..." she said, "how can you wear that?"
"That's what I should be asking you," Isabella replied.
"Isabella! You're ok!" 2nd Phineas said going to hug her, but she stops him before he can.
"Yeah, not the time, Phineas," she rejected.
"Ferb, scan the bug, por favor," Phineas said. Ferb scans it. 2nd Candace gets an alarm on her watch.
"Huh?" She said, looking into the watch. "Jeremy? What's going on?"
"Sir, I am in the Emergency Underground Resistance Enterprise, or EURE for short. I have a set of platypuses...playpi? platypeople? whatever...here as well." Everyone could see two platypuses. One normal the other cyborg-like.
"Perry!" Both Phineas' spoke simultaneously. "You're ok!"
"Isabella, Phineas & Ferb are here with me. Where are the others?" 2nd Candace asked.
"They have become like zombies! As well as every man, woman and child in the Tri-State Area. It's like an epidemic..." 2nd Jeremy answered.
"Yeah.. Isabella was one of them..." she said looking at her.
"What should we do, sir?" He asked.
"Stay there...change the code so the others can't get inside. If they are being mind-controlled, they could prove to be trouble. We will get there soon." 2nd Candace stated.
"Understood." Jeremy's picture leaves the watch.
"We have to get back to our dimension...but we can't do this alone," 2nd Candace said, looking at the 1st Dimension crew... "We're gonna need all the help we can get."
"Isabella?" Phineas said.
"On it," she answered, already getting the idea.
"Let's head over to our backyard. We're gonna need a few things. Ferb, I know what we're gonna do today!"
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