Spongebob Meets the Strangler / Pranks a Lot
S3, E20: SpongeBob catches someone littering and turns him in, but it's the Tattletale Strangler! SpongeBob and Patrick invest in some magic invisible spray at the local prank shop.

S3, E20: SpongeBob catches someone littering and turns him in, but it's the Tattletale Strangler! SpongeBob and Patrick invest in some magic invisible spray at the local prank shop.