- Edited for Syndication: After the original airing of the televised version, an edited version began airing that removed "No Control", "Daddy Knows Best", "Poor Pirates", "Bikini Bottom Boogie", and "(I Guess) I Miss You".
- Fake American: British Gavin Lee as American-accented Squidward.
- Keep Circulating the Tapes: The show's available soundtrack is from the Chicago run, with the original cast and the original versions of the songs. The Broadway version of the soundtrack, the version used for the television live show, has not been given a professional recording.
- The Original Darrin: The TV version is notable for casting the one and only Tom Kenny back into the role of Patchy the Pirate.
- The Other Darrin: In the televised version, there were a few notable cast changes:
- Lilli Cooper, the original Sandy, was replaced by Christina Sajous, who replaced Cooper in the original run, since Cooper was appearing in Tootsie on Broadway.
- Stephanie Hsu, the original Karen, was replaced by Katie Lee Hill, due to Hsu taping her recurring spot on The Marvelous Mrs. Maisel.
- The Mayor is played by Bryonha Parham, instead of her original actress from the Broadway run, Gaelen Gilliland, who was traveling with the national tour of Mean Girls.
- The Other Marty: Several actors changed from the Chicago pre-show to Broadway. In Chicago, Mr. Krabs, Pearl and Plankton were played by Carlos Lopez, Emmy Raver-Lampman, and Nick Blaemire respectively. On Broadway, they were replaced with Brian Ray Norris, Jai'len Josey, and Wesley Taylor. Same goes for Mark Ledbetter as the French Narrator and Old Man Jenkins (who's replaced by Tom Kenny, reprising his role from the cartoon, and J.C. Schuster).
- Name's the Same: "Mt. Humongous" was used for a mountain Squidward helped a skier climb in the episode "Giant Squidward".
- Repeating Ad: During the run up to and just after its official opening, ads for this musical were shown constantly during every bit of family-oriented programming in the NYC area. During the local broadcast of A Christmas Story Live, they appeared in every break during the second half of the event.
- Role Reprise: Tom Kenny himself voices the French Narrator for the show's Broadway run. In the filmed version, he reprises the role of Patchy the Pirate.
- Romance on the Set: Stephanie Hsu (Karen) and Allan K. Washington (Larry the Lobster) are married in Real Life (they tied the knot two months before the show debuted on Broadway). Funnily enough, Washington got the chance to play Plankton for a few performances, so you can bet that the romance between him and Karen was genuine.
- What Could Have Been:
Tina Landau: I thought what they were asking me to come in about was kind of a theme park show with big mascot costume heads, so I said no. And he said, "Wait a minute, [Stephen] Hillenburg, the creator of the show, comes from experimental animation and is a marine biologist, and he's really interested in some form that is indie".
- When director Tina Landau was first approached to helm the musical, she originally declined, believing that she was being asked to direct a silly kids' show or theme park attraction. She eventually joined the project when she became fascinated with the cartoon's surreal "indie" humor; since she had a knack for experimental theater, Landau felt that the show's avant-garde nature had enormous potential for the stage.
- The climactic scene where SpongeBob climbs to the mouth of Mt. Humongous was originally going to be done with a series of rolling ladders (much like the one the the Mayor uses in the show), but this was dropped in favor of the enormous ladder web that's used in the current show.
- Photos from the show's 2012 workshop give a good look at some very early concepts for the show, including alternate ways to portray SpongeBob onstage (through the use of small puppets or large "sponge head" costume pieces) and actual giant bubbles used for the "B.F.F." number.
Trivia / The SpongeBob Musical