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'
Son of the Pink Panther Panther films. Gambrelli closes the film with the line: "That felt good!" following by the image of Gambrelli freezing as the animated Pink Panther walks across the still of Jacques, until an animated Gambrelli suddenly cuts away the head of live-action Gambrelli and pops out of the hole, dropping the head on the Panther's foot; the enraged Panther chases him into fading blackness. Note: Claudia Cardinale played the Princess in the original "Pink Panther" film. Here she returns as Maria Gambrelli, the part originally played by Elke Sommer in "A Shot in the Dark". This was the first "Pink Panther"