Phineas and Ferb: Night of the Living Pharmacists, on Disney Channel & Disney XD
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streaming sites: Amazon; Disney+ (s4e29-30); Google Play; YouTube

This hourlong special of Phineas and Ferb aired in October 2014, but I didn't see it until 2024, on Disney+.

Dr. Doofenshmirtz has created an -inator that he plans to use to make his brother, the mayor, repulsive. It ends up turning him into a mindless clone of Doofenshmirtz, who turns others into clones by touching them. Soon Danville is overrun by Doof clones, who can only say "lots of me". (It took me awhile to figure out what they were saying. At first I thought it sounded kind of like "not zombie".) Meanwhile, Phineas, Ferb, and their friends get rubberized so they can bounce all over town. Candace goes to a get-together with Vanessa and some of her friends, while Stacy stays home and watches a horror movie. I... don't really know what else to say about the plot, except that Phineas, Ferb, Baljeet, Buford, and Isabella end up trying to save Danville and turn everyone back to themselves. (Unbeknownst to them, they get a little help from Perry.) Honestly, tons of other stuff goes on. The special even has cameos by Simon Pegg and Nick Frost from Shaun of the Dead, and even George A. Romero himself! And there's just so much funny stuff going on, I couldn't begin to describe it all, even if I didn't care about avoiding spoilers (which I do). So, um... yeah, it's just all really cool.