Trail of the Pink Panther series regulars include Herbert Lom as Chief Inspector Dreyfus, Graham Stark as Hercule LaJoy (last seen in the 1964 Pink Panther film "A Shot in the Dark"), Burt Kwouk as Clouseau's faithful man servant Cato and André Maranne as Sgt. François Chevalier. "Trail" featured the animated opening and closing credits, animated by Marvel Productions and written and directed by Art Leonardi. Director Blake Edwards dedicated the film to Sellers, "the one and only Inspector Clouseau." Despite the dedication, Sellers' wife Lynne Frederick filed a $3 million lawsuit against the film's producers and the studio, claiming that the film diminished Sellers'
The Pink Panther have any other recurring characters from the rest of the series. Although it was produced by the Mirisch Corporation, Peter Sellers, Blake Edwards, and Henry Mancini were not involved in the making of this film. This not only marks the return of the famous "Pink Panther" diamond but also - after an 11-year hiatus - that of Peter Sellers as Clouseau, along with director Edwards, Mancini, Dreyfus and Cato. Sir Charles Lytton is portrayed by Christopher Plummer; the film also co-starred Catherine Schell, Peter Arne, and Graham Stark. Dreyfus' insanity reaches a pinnacle, as he tries to intimidate the rest