Jovian and the Kratt brothers explain how several species hatch from their eggs. They note the similarities in how each species hatches: by breaking the shell and fighting its way out. They mention that some snakes get help from their mothers when they hatch.
Kramer and Newman hatch a scheme to arbitrage bottles from NY, where the deposit is 5 cents, to Michigan, where the deposit is 10 cents. They can't figure out how to make the costs work; gas is too expensive (variable costs), and there's too much overhead (fixed costs of tolls, permits, etc.) with using a semi to haul the bottles in volume. Finally, they hatch a scheme to use a mail truck, which lowers their variable and fixed costs to zero.
Billy, suffering from entomophobia, finds an odd egg in Grim's trunk. Billy imagines a duck would hatch from such a large egg, but a giant spider who Billy names "Jeff" emerges, freightening him. Jeff visits Billy that night as a fully-grown giant spider, referring to him as "Dad". Although Jeff is mild-mannered and friendly, Billy cares more about the fact that he's a giant spider and wants him "squished."