Part of the runtime is a greatest-hits compilation, whether you asked for one or not. Clues pile up faster than anyone can label them, and Gon looks like the only person who brought a filing cabinet. Someone says "I cannot tell you how my power works, but we found him by using it." with a completely straight face, and it works. The main story waits patiently in the car while this one runs an errand. It delivers, without fuss.