Mata Hari, Agent H21 (Italian:Mata-Hari, agente segreto H21) is a 1964 French-Italian spy film directed by Jean-Louis Richard and starring Jeanne Moreau, Jean-Louis Trintignant and Claude Rich.

In Paris during the First World War, an exotic dancer called Mata Hari moves in the best circles and has affairs with influential men.

At a party she lures Captain François Lasalle, a French army officer, back to her apartment.

When German agents succeed in blowing up the depot, Greitje is offered a ticket to anywhere in the world.

Making her way to Paris, she is arrested as she leaves the bank and, after a court martial, shot.