The film was intended to spin off the character of Clifton Sleigh as the next Inspector Clouseau in a series of new Pink Panther movies, but it never took off. Ten years later, a sequel was made, with Clouseau's son picking up the mantle in Son of the Pink Panther (1993), but this didn't take off either.
The odd name featured during the closing credits, "Turk Thrust II", was a pseudonym for Sir Roger Moore. The name was a nod to Moore's friend Bryan Forbes, who often used the name "Turk Thrust" when playing cameos in his own movies. Forbes was actually billed as "Turk Thrust" in A Shot in the Dark (1964), in which he played an attendant at a nudist camp.
The story element of Inspector Clouseau turning to crime, with his new wife archcriminal, a.k.a. "The Frog", was taken from the second draft of the unfilmed screenplay of "Romance of the Pink Panther". Before Peter Sellers' untimely death, two drafts had been written for "Romance of the Pink Panther". When Sellers passed away, the project was cancelled.
Dudley Moore and Rowan Atkinson were both considered for the role of Detective Clifton Sleigh. However, Moore declined the role not wishing to commit to a series following the success of Arthur (1981), and Atkinson was rejected by the studio, as he was unknown outside the United Kingdom at the time. John Ritter and John Cleese were also considered for the role. Cleese would go to appear in The Pink Panther 2 (2009) remake.
Sir Roger Moore briefly plays Chief Inspector Jacques Clouseau, and as such was the first major actor to play Clouseau on-screen, in a major direct performance after Peter Sellers. Moreover, in addition to portraying Evelyn Tremble in Casino Royale (1967), Sellers also played James Bond 007 in that movie, meaning that Moore and Sellers have the distinction of playing two famous spy or detective characters, James Bond and Inspector Clouseau.
Dudley Moore was the original choice for the role of Clifton Sleigh. This film includes a scene based on Moore's role in Arthur (1981), when Harvey Hamilcard III, a drunken short man wearing a tuxedo, top hat, and riding in a limo, propositions Sleigh, who is disguised as a prostitute. Moore and Blake Edwards worked on two films together, 10 (1979) and Micki + Maude (1984).
The first "Pink Panther" titled movie with "Pink Panther" wording in its name not to star Peter Sellers as Inspector Clouseau. Alan Arkin had played the title character of the French detective in Inspector Clouseau (1968), but that movie was not titled with a "Pink Panther" phrase.