Harry Piel plays Harry Peel who receives an urgent telephone call from a friend who has returned from South America recently. The call is being made from the circus "Beely" and our hero arrives there too late to prevent the murder of his friend. Now Harry must find his friend's killer and go on a strange mission involving a hidden document.
| Actor | Role |
|---|---|
 Harry PielHarry Peel | Harry Peel |
| CCharly BergerAllan Kean | Allan Kean |
 Eugen BurgZirkusmanager | Zirkusmanager |
 Fritz GreinerKriminalkommissar Bull | Kriminalkommissar Bull |
 Erich Kaiser-TitzDoktor Oskar Waldow | Doktor Oskar Waldow |
| IIlona KarolewnaRose Jackson | Rose Jackson |
| MMax Ralph-OstermannRobert Jackson | Robert Jackson |
 Hanni WeisseAnita de Moran | Anita de Moran |