Robert Moor

as Berthier

as Official (uncredited)

as Licaire

as Un docteur

as M. de Montesson

as Le procureur

as Un diplomate (uncredited)

as (uncredited)

as Professor

as Un docteur du train (uncredited)

as Professor Peccavi

as Member of the circle

as Examiner, as Examiner (uncredited)

as Chemist

as le vénérable vieillard

as Notary (uncredited)

as Professor Georges Limousin (uncredited)

as Man at Rouletabille's party (uncredited)

as The domestic

as Le mage

as Employee