About the characters

- Second time Ulrich launches the Return to the Past.
- Aelita says she doesn’t want to lose Jeremy.
- Rosa’s specialties are ratatouille and hash pie. In English her specialty is said to be chopped sirloin.
- Odd is a fan of a series called Hospital of Horrors. In the English dub the series is referred to by two names, Hospital of Horrors and Horrors at the Hospital.

About errors

- When Odd asks for an explanation about the return trip at the start of the episode, we see Ulrich talking, not him.
- How can Aelita talk to Ulrich without the microphone?
- Aelita’s outfit is reversed when she enters the tower at the start of the episode.
- Jeremy’s keyboard disappears when he destroys the helmet.
- Yolande’s phone changes between the moment when she calls the hospital and when she tells Aelita Jeremy needs to sleep.
- The door to Jeremy’s room is open when Ulrich says he’s not very tidy when it was closed when he asked if they have not one, but two enemies.
- When Ulrich takes the factory microphone, it’s wireless, then it disappears after Yumi responds that things aren’t going well, at the moment when he enters the co-ordinates for the RTTP the microphone disappears from his ear.
- The principal’s moustache and eyebrows are grey when he tells the ambulance driver there are papers to sign, when Yolande tells Yumi Jeremy’s not the one driving, and his eyebrows are grey when the ambulance driver says “Hey, my ambulance!”
- The colours of Odd’s pants are inversed when Ulrich talks about Jeremy’s behaviour, when Odd talks about Dr Schrank, when Yumi asks Jeremy to calm down and when Ulrich approves of Odd’s Dr Schrank idea. His pants become entirely the darker shade of purple when Rosa falls unconscious, after the second RTTP, when he leaves the infirmary, seeing the file in Jeremy’s room and after finishing the video file.
- Odd’s undershirt is missing from his torso when Yumi tells Jeremy to chill at the drink machine.

About the series

- French title: Tentation

- Third exploitation of Franz Hopper’s journal, allowing Jeremy to make a helmet that amplifies his brain waves. The genius realises that Hopper’s inventions surpass themselves, even Hopper himself! It should therefore be taken with a grain of salt.
- First use of Odd’s shield.
- First mention of a series called Hospital of Horrors with the mad scientist Dr Schrank. Several allusions are made to this series in following episodes.
- Third episode in which the RTTP is launched more than once.
- Reappearance of the ambulance driver from episode 18, “Killer Music”.
- Ulrich: “Uh, may I remind you that going back in time makes XANA stronger?”
Allusion to episode 30, “A Great Day” in which XANA uses the returns in time to increase its power.
- The water the ice platforms float on when the boys break the ice into smaller pieces isn’t part of the Digital Sea and can be swum in.

About references

- Ulrich: “Now I know what Tweety feels like against Sylvester!”
Tweety (Ulrich and Odd) is a miniscule yellow canary who needs to escape the clutches of Sylvester, a cat with much larger proportions than Tweety (Rosa), from an animated series of the same name, part of the Looney Tunes series.