Complex sentence: Underdog, the police, and everyone in the country were baffled because of these crime waves until Underdog found out Batty-Man was the crook behind the crime wave after Sweet Polly was taken captive.
Split into simpler sentences: Underdog, the police, and everyone in the country were baffled because of these crime waves. Soon, Underdog found out Batty-Man was the crook behind the crime wave after Sweet Polly was taken captive.