Il trattato scomparso

Memo Benassi

as John Brown, il detective

Leda Gloria

as Anna

Giuditta Rissone

as Alice

Ninì Dinelli

as Clara

Lamberto Picasso

as Fersen

Ernesto Sabbatini

as Ammiraglio Morstan

Mino Doro

as Carlo

Fosco Giachetti

as Raythan

Alexandre Mihalesco

as Jackie

Oreste Fares

as Mister Baskerville

Giovanni Ferrari

as Un autista