Is There a Doctor in the House?.After crashing through the front of an antiques store, the brothers disguise themselves as doctors in order to steal a top-secret growth formula (which was discovered by Dr. Peveril Peak, and Professor Y has hired them to steal it) from Saint Spooner's Hospital; after they get high on laughing gas, they try to pick the already-unlocked lock of Dr. Peak's laboratory, and when Dr. Peak himself shows up to lock it, he gives his formula to Hugo to hold. Both brothers then make a run for it, but they run into a pair of police officers who had showed up at the antiques store earlier (the formula also smashes over Hugo), so they are sent to jail, where Hugo grows to a huge size.