Stefán Karl Stefánsson, aka "Robbie Rotten", is universally accepted as number one!
This episode contains a song called "We Are Number One". This song became a big hit on the internet and spawned multiple parodies and spoofs.
This is the only episode Ziggy no longer makes an appearance as well as Trixie and Pixel absent too.
This is the final appearance of Mayor Meanswell and Bessie Busybody.