Special Mission Lady Chaplin (Missione speciale Lady Chaplin) is a 1966 Italian-French-Spanish adventure spy film. It features Ken Clark, Daniela Bianchi, Helga Liné, and Jacques Bergerac.
Lady Chaplin is a beautiful woman, she is a fashion stylist and she owns an atelier in Paris. Zoltan is a rich American specialized in submarine researches. Dick Malloy is an American secret agent. What have the three in common? Perhaps a sunk American atomic submarine with sixteen missiles still on board?