It was 3 years after the second dimensional experience. There were a few bumps on the road here and there, but things were rather smooth sailing for the most of it. Heinz Doofenshmirtz had kept his evil on the down-low if and would weekly take a day off for his "nemesis". Phineas and Ferb were still inventing but after an invention backfired and accidentally turned Phineas into a girl for 8 days, they kept things a bit smaller. But it was all going to change one fateful day. One day that no one would ever have been prepared for.
"So anyway, Perry the Platypus,", the mad doctor was saying to the caged agent. "Recoil in horror before the awesome might of my destroyinator!"
'Well, he's certainly putting spirit into it today.', Perry thought to himself with a smile as a large inator rose from the floor.
"And the best part, is that there is NOTHING that you can do to stop me from...", Heinz leaned on the control panel but accidentally pressed the self-destruct button as he talked. "...getting ready to wipe out city-"
"Look out!", Perry yelled a split second too late.
The inator exploded but unlike other times, Doofenshmirtz was backing away from the smoke, trying to fan it away from his face and backed up too far. He tripped over the edge of his balcony and went plummeting to the street below.
"HEINZ!"