Boyfriend From 27,000 B.C.

Episode Summary
The episode starts out with Phineas and Ferb watching an interesting prgram on their television called "Cavemen" causing them to eventually decide to find a caveman in the Danville Glacier while Candace is upstairs trying to find something to wear for Stacy's costume party. Candace gets a call from Jeremy and he says he is going as a caveman which causes Candace to go as a cavewoman. As Phineas and Ferb gather supplies for cavman hunting, their parents leave for the Historically Relevant Botanical Gardens, while Perry heads for his lair. Stacy asks Candace to make a sandwich platter and goes off to do that while Phineas and Ferb head to the Danville Glacier.

Perry uses a card to pick the lock of Dr. Doofenshmirtz's door and ends up getting stuck in one of his traps while Dr. Doofenshmirtz rants about his scheme to rid the Tri-State Area of one of his biggest pet peeves, people who dress as sandwiches to advertise restaurants.

Phineas and Ferb are shown bringing home their newly found caveman, Conk.

Dr. Doofenshmirtz flies off in his new invention and Perry the Platypus breaks free and flies off after him.

Perry's Entrance to his Lair
Perry scuttles up a storm drain and pops out in mid-dressing of a magpie costume, then walks onto a power line scaring off some magpies, and hops into an emergency phone on the phone line pole, ending up falling from the ceiling of his lair landing into his chair.