- Clouseau traveled back in time to save Dreyfus.
- Dreyfus is replaced by a doppelganger.
- Strikes Again is technically non-canon to the other films.
- It was All Just a Dream from whoever's perspective it was.
- Dreyfus rematerialized in his cell in the insane asylum from which he escaped.
- I have a theory that when the machine was destroyed everything it had done was undone. I think the castle must have materialized again, only now it would be empty, Dreyfus must have appeared in the asylum (or not in the asylum, but either way he landed up there), and the UN building returned. I think nobody remembered Dreyfus blackmailing all those governments or destroying the building, only that he escaped from the asylum. How else (unless one of the first three is true) did he get his job back in Trail?
- On the other hand, Clouseau meets Drummond and Quinlan from Strikes Again for the first time in Trail, the same film where Dreyfus gets his job back, and also purchases his Strikes Again disguise in this film, meaning that they are ignoring Strikes Again (the reason for these scenes is that they are deleted scenes from the other film being recycled.)
The only time the scientific principles behind Professor Fassbender's invention were described, it was by Dreyfus himself mentioning that he "was very interested in [the professor's] works on space/time relationships". This kind of researches doesn't naturally lead to disintegrator rays; it leads either to tele-transporting rays or time machines. Not that Dreyfus was necessarily aware of it, nor the professor, hence why he acts as though the objects he blasted with the ray were really gone; instead they were just transferred to some months in the future in random places. So was Dreyfus himself.
- And the Dreyfus played Kevin Kline is actually the original Dreyfus' (Herbert Lom) nephew, who coincidently is also called Charles.
- Alternatively, he could be his son, jealous of his half-brother's attention.
- When the movie was first announced in 2001, press releases did say that Steve Martin would be portraying an older version of Clouseau's son.
He had his body changed for the events of Return and reverted to his old one some time thereafter.