While helping Percy to the works, Douglas shares a lesson he once learned about mistakes. A slightly experimental remake of the Missing Episode of the TV series.
This episode contains examples of:
- Compressed Adaptation: For "The Missing Coach" due to this being a flashback.
- Mythology Gag: Douglas mentions to Percy about the time he went to the Fat Controller as a deputation to save him from being scrapped.
- Synchronous Episodes: This episode takes place during the events of the previous episode "Tolerance".
- Whole Episode Flashback: Of "The Missing Coach" and the aforementioned missing episode from the TV series.
