Falsetto Flu was originally called Falsetto Fever.
The original plan of "A Royal Wedding" was that Queen would tell all five children about her wedding while they were all sick with Falsetto Flu. This was later changed into her telling it to Rita for a bedtime story, while the "all the kids are sick" bit went to another episode, "Sitter Jerico".
"Sitter Jerico" was originally going to be about Hermio.
The Octonauts: Stormy Sea Adventure
Cross-Cast Role: If the situation calls for it, Peso and/or Shellington can be played by a female actor.