This late offering (1959) from one of the all-time great French directors Julien Duvivier, with a taut script by Henri Jeanson makes for a very entertaining experience. An ex-Resistance member whose code-name was Marie-Octobre (Danielle Darrieux) gathers the old Group together several years after the war for a Reunion-cum-unmasking because back in 1944 one of the Group was killed by another member and now it's pay-back time. Duvivier skillfully manipulates his actors - some of the finest in French cinema at the time - without allowing either them or his camera to leave the confines of the house. Of course one could argue that Agatha Christie did it first but there's always room for well-done drama of this nature and with actors of the calibre of Paul Meurisse, Lino Ventura, Bernard Blier, Serge Reggiani and, of course, Danielle Darrieux a great time is had by all.
Review of Marie-Octobre
