Dossier 51 is a 1978 French crime drama film directed by Michel Deville and based on a novel by Gilles Perrault. Deville and Perrault won a César Award for Best Writing for their adaptation. The film was screened in the Un Certain Regard section at the 1978 Cannes Film Festival.


An unnamed French intelligence service (though this is never made clear) attempts to coerce a French diplomat into working for them.