When does Belphégor return?

Belphégor (English title The Mystery of the Louvre) is a 1927 crime novel by French writer Arthur Bernède. It was simultaneously adapted for the silent screen as a 220-minute movie serial, directed by Henri Desfontaines. The film also featured Lucien Dalsace, Michèle Verly (as Colette) and Genica Messirio. The novel inspired several other adaptations, including an eponymous 1965 French television series starring Juliette Gréco in the title role.