I wouldn't nessecarily say this is a BAD film. Just a rushed one. Some of the dialouge is either extremly badly acted (mostly from the mafia bosses wife) or just badly written, as if the writer wrote it when he was sleep walking. A\On the other hand, the Peter Sellers footage, both the unused stuff and the flashbacks, light up the entire film. One scene that is not with Sellers is majorly note worthy:
Dreyfus dreams that Cleuseau put 3,000 pounds of Jello in his swimming pool, then wakes up and dives into the pool cover!
this is not a bad film. It is just not for people who expect it to be the same as the other Panther movies.
P.S. The scene where the Pink Panther diamond is stolen, is the CHEAPEST robbery scene I have ever seen, and it is used AGAIN in "Curse of the Pink Panther"!