The Dreyfus character seems to get a quasi-reboot at the beginning of each new film as he mysteriously re-appears as Clouseau's superior, most often without explanation, after committing various heinous crimes.
As such, he is even promoted to Chief Inspector over the course of the series, and is regarded by many other characters who presumably have not met him as France's greatest detective; those characters he actually encounters, nevertheless, are quick to realise his incompetence and limitations.
Characters drink liquor, in particular, a flaming drink.
Planning for that momentous day began immediately after the Suez Canal Crisis.
Upon arrival, the Pink Panther and the Inspector then disembark from the Panthermobile and enter the famous theatre.
He eventually becomes Chief Inspector in the original series, and he'll be the first to remind you of his full title.