In "Dear Vikings," when SpongeBob, Squidward and the vikings crashed into an iceberg, the dragon thing from the boat breaks. But when SpongeBob makes the boat get up, it's back on.
There were torches and a fire on the ship, but they're underwater.
Most of the viking's names were Olaf. In the episode "Bubble Buddy," if you look closely in the menu, you'll see a combo called "Captain Olaf's Special".
In the episode "Ditchin'", it shows a part of the new Mermaid Man and Barnacle Boy origin comic book with a man resembling Barnacle Boy and a woman resembling Mermaid Man in a spaceship. The woman had two children in her arms which resembled Mermaid Man and Barnacle Boy, so it may conclude to the fact that Mermaid Man and Barnacle Boy might be brothers, but in other episodes, they act like friends.
In ''Ditchin','' SpongeBob says that he has Boating School at 8:00, but in ''New Student Starfish,'' Boating School starts at 9:00.
We learn that Patrick can eat ice cream with his one front tooth.
This is the second time Mermaid Man and Barnacle Boy appear without their names in the title. The first was "Night Light."
Barnacle Boy has a much different voice in this episode.
We learn that SpongeBob's favorite drink is Bubbly Water.
Ditchin': This is the first time someone plays Badminton on the show.
9th (in person) appearance of Mermaid Man and Barnacle Boy.
SpongeBob: Lady, if you don't let go off of me, I'm going to turn into a criminal! (runs off)
Lady Fish: (sad and about to cry) That sounded like a threat.
Blue Fish: (hugs Lady Fish) I am so sorry.
Gray Fish: It's a shame what happened to Dale. We were classmates back in Boating School. He used to be a good student, until he started cutting class. Ever since then, he's led the lonely life of a criminal.
Police Fish: Quasi Gummy Chewy Candy Fish. Is this how you have fun? By eating your own kind?
(Dale laughs nervously)
Police Fish: Scum like you make me sick. CUFF HIM!
Police Fish: Not today, yellow. You've been playing with a convicted felon, and we know he's violated his parole somehow. You might as well confess, Dale.
Dale: Hey, man! I haven't done nothing!
Police Fish: Oh, yeah? What have you got in there?
SpongeBob: Bikini Bottom hug fest?
Female Fish:(aproaches SpongeBob and hugs him) Don't fight the love, kid.
SpongeBob: Now that's what I call a viking-sized adventure.
Squidward: The vikings were a race of scholars and scientists who lived even before Mr. Krabs. They were known to invent ketchup and on the weekends, they liked to dress their pets up like chunks of masonry. Their favorite movies were in black and white.
Viking: Look out!
Squidward: And viking royalty liked to collect socks and trade them at rituals called... Socken-garten.
SpongeBob: Okay, Mrs. Puff, I'll never ditch again.
Mrs. Puff: Good boy, SpongeBob, good... again? What do you mean, again?!
Patrick and Sandy don't appear in "Dear Vikings", Squidward and Mr. Krabs don't appear in "Ditchin'".
Gary doesn't appear in these episodes.
SpongeBob actually kissed Squidward in this episode.
Apparently, not only is Sandy the best karate player ever, but she is also the best badminton player ever.
"Ditchin'" marks the fifth time Mrs. Puff gets arrested.
The original name for "Dear Vikings" was "What A Viking".
The episode "Ditchin'" was very similar to the Hey Arnold episode "Hookey," when Arnold and Gerald play hookey.
The comic about Mermaidman & and Barnacleboy's origins is a parody of Superman's origins.
When the vikings hit an iceberg with their ship, it is a reference to how the Titanic sunk.