When the Mayor is informed that the Earth's crust beneath Pawley's mine was very thin and may lead into the core of the Earth, the Terror Twins investigate and discover that the claim is true.....and strange, rubbery men emerge from the Earth's core.; When a colt mysteriously goes down and displays heart problems, the Terror discovers Picrotoxin in the colt's blood, which, in fatal doses, causes paralysis of the heart.; The Terror Twins investigate the disappearamnce of Dr. Willis, who was experimenting with and wanting to mass produce a substance called Methylamine, a compound that produces a strange cellular energy in which a vacuum is created around the lower part of one's body, causing propulsion.; Steve notes an ad in the paper in regards to a $50,000 reward for the return of a millionaire's daughter who had been kidnapped when she was one year old. When the kidnapper's decide to use a look-alike girl with the same birthmark on her foot to collect the reward, the We-Do-It Boys get involved.; When Zippie brings a bouquet of roses to his girl, she gives him a big kiss. Awestruck, he quickly leaves to get more roses!