| Jupiter Jones |
First Investigator |
(Justus Jonas) |
|
| Pete Crenshaw |
Second Investigator |
(Peter Shaw) |
| Bob Andrews |
Records and Research |
| Titus Jones |
Justus' uncle |
(Onkel Titus) |
| Mathilda Jones |
Justus' aunt |
(Tante Mathilda) |
| Hans Schmid |
helper at the Salvage Yard |
(Patrick O'Ryan) |
| Konrad Schmid |
helper at the Salvage Yard |
(Kenneth O'Ryan) |
| Skinner 'Skinny' Norris |
archenemy of the Three Investigators |
| Prof. Carswell |
linguist |
| Hal Carswell |
Prof. Carswells son |
| Mr. Joshua Cameron |
deceased painter |
| The Countess |
she masquerade as Joshua Camerons sister |
| Mr. Armand Marechal |
estate manager of the Countess |
| Mr. De Groot |
private detective from Amsterdam |
| Mr. Maxwell James |
famous artist |
| Mrs. Norris |
her line was taped |
| Miss Carol Bennett |
librarian; directress of the city library of Rocky Beach |
| Samuel Reynolds |
Chief Inspector of the Police of Rocky Beach |
| Mr. Alfred Hitchcock |
|
[(white in brackets) = german name]
|