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 Return of the Pink Panther them. However, Dreyfus has followed Clouseau and is outside the hotel room with a rifle — Dreyfus is the "mysterious assassin" who has been trying to kill Clouseau all this time — and just as Dreyfus shoots at Clouseau, the Inspector ducks to check if his fly is undone, and the shot kills Sharki instead. The other three take cover, while Dreyfus, insanely enraged by his latest failure to kill Clouseau, fires wildly until he is arrested. For once again recovering the Pink Panther, Clouseau is promoted to Chief Inspector, while Sir Charles resumes his career as a jewel thief