After their pet goldfish did so much for them, Phineas and Ferb build an aquarium in their backyard as a way of saying thanks. Meanwhile, Candace awaits a call from Jeremy. And Perry the Platypus stops Doofenshmirtz from destroying hot dog vendors.
Phineas, Ferb and Candace Sub-plot
Perry and Doof
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"Attack of the 50 Foot Sister"
"Day of the Living Gelatin"