About the characters

- First episode in which Jim cries.
- Second time a character other than Ulrich holds his sword.
- Third time Ulrich rides the Overboard.
- The hospital nurse (Chantal Phan) practises aikido.
- Jim wrote a one-scene play.

About errors

- The door to Jeremy’s room is dark blue instead of grey.
- The marks under Sissi’s eyes (actually the Tarantula) are absent.
- The factory microphone disappears from Jeremy’s ear when he says the Mantas are arriving at 10 o’clock and it changes constantly (wired or wireless)
- Jeremy looks at the Holosphere for Sector 5 during a sequence after the first shield has been destroyed. But on the Holosphere, the two projections are still there!
- The principal’s eyebrows are grey when Mr Chardin talks about what Odd and Ulrich are doing, as well as when Ulrich falls. Herb’s hair is entirely black at that same moment.

About the series

- French title: Tarentule au plafond

- First time both shields on the Core are destroyed.
- Ulrich and Odd’s hospital room is the same one Sissi was in during episode 50, “Contact”.
- Mr Chardin makes an allusion to the Romeo and Juliet performance held the year before! It happened in episode 15, “Laughing Fit”.
- First and only episode in which the episode title screen is decorated not with a tower, but with a Holomap, where the Forest and Desert Sectors are absent after their destruction in episodes 54 “Lyoko Minus One” and 58 “The Pretender”.
- In this episode, the animators drew in many secondary characters not seen since seasons 1 and 2! We can see doctors from episode 37 “Common Interest” and the nurse from episode 50 “Contact” at the hospital, JT and Edna from episode 45 “Cold War,” the policemen from episode 3 “Holiday in the Fog,” the bus driver from episode 4 “Log Book” (though he was in episode 54 “Lyoko Minus One” also), the ambulance driver from episode 18 “Killer Music,” and even the art teacher Mr Chardin!
- The hospital receptionist is reading Sumo magazine, recurring several times in the series, often read by Jim or Ulrich.
- Yumi’s line in the play, “In truth, I seem to speak from distant heights!” was spoken by Odd in the first run-through before the return trip.

About references

- The play performed by the heroes is the French play Cyrano de Bergerac. It’s a great success about a big-nosed character that has been in love with a beautiful woman for a long time, another whom he helps seduce her and other world-renowned, now stereotypical, characters!
A famous line of Cyrano’s is “It’s a rock! ... A peak! ... A cape! What’s that, it’s a cape? … Forsooth! It’s a peninsula!”
In this episode, we see the scene on the balcony, where Cyrano dictates the words of another character trying to charm Roxane, who Cyrano is actually in love with!

- Nurse: “Sorry young man, but I’m a tenth dan in aikido.”
Aikido is a budō; a method of education through a Japanese martial arts style.

- Old woman: “Game of tiddlywinks?”
Tiddlywinks is a game in which small plastic counters are flicked into a central area by being pressed on the edge with a larger counter.