Kat and Doofenshmirtz were walking one 日 when Kat sat, and wouldn't get back up. Was she just being a stubborn brat, 或者 was something wrong? Then, he noticed how pale her 毛皮 was. Was his best pal getting old? Kat had very bad arthritis in her hips. They often collapsed on her. She was deaf, and was almost blind. One day, she collapsed on her old, shot, creaky, hips, and wouldn't get back up. Luckily, the vet saw. After a few long moments, the vet came out and 说 they would have to go into serious surgery. Doofenshmirtz went back with the vet, who was about to give her a shot. "There's...

An alien named Meap crashes in Phineas and Ferb's backyard, and runs off. The boys try to find the cute alien, as Doofenshmirtz tries to find his old friend Balloony.

Episode Summary

Phineas and Ferb accidentally knock an alien spacecraft into their backyard while playing baseball. It falls into their backyard and they find Meap. Meap shows them a picture of a rogue alien and Phineas misinterprets it as his father. While they are busy trying to repair it, Candace discovers Meap, an alien she believes has been "roboticized" 由 Phineas and Ferb, and sets out to bust her brothers with the evidence...