Dogtanian and the Three Muskehounds (1981)

S1E8 Juliette's Secret

Dogtanian dreams of Juliette, who is employed at the palace under Queen Anne's service. She is tasked with delivering a crucial message to the Duke of Buckingham, who is in hiding in Paris. At the same time, Richelieu has put Captain Widimer on suspension and has received a letter from Milady, hinting at deeper intrigues at play.