36. Groundshark Day

Sly the mailman is quietly delivering the mail on his bike when the fin of a monster comes surging up from underground and heads right for him! Sly manages to escape, but the effects of the incident are immediately felt. The people of Joliville are terrified and no longer dare to go outside or set foot on the ground! The Agency has to find the monster’s Achille’s heel to save the day…