SpongeBob SquarePants - Season 6 Episode 24 -

There's a new Viking-themed promotion at the Krusty Krab, so SpongeBob is determined to find out everything there is to know about Vikings. Since there's no better way to find out about Vikings than to communicate with them directly, SpongeBob writes a letter to the Vikings, and is surprised when they visit the Krusty Krab to answer his questions in person.