Det hemmelighedsfulde X
VoltarElenco
Benjamin ChristensenLieutenant van Hauen
Karen SandbergLieutenant van Hauren's Wife- Fritz LamprechtRear Admiral van Hauen
- Amanda LundOld Jane, nurse
- Hermann SpiroCount Spinelli
- Svend RindomTeacher
- Otto Reinwaldvan Hauen's oldest son
Bjørn SpiroJohnny, van Hauen's youngest søn- Robert SchmidtLawyer
- Holger RasmussenNaval officer
- Charles LøwaasNaval officer
- Finn WennerwaldNaval officer