Ten-year-old Ole is full of mischief. He attempts to fly and is hospitalized with a broken leg. When he sees a Sherlock Holmes movie on TV, however, he forgets about the pains and comes up with a new plan. Disguised as Sherlock Holmes and Dr. Watson, he and his friend Andreas start searching for criminals. Soon, the two boys detect their first case. On the street they meet a man wearing a stuck-on beard. The hobby detectives find this very suspicious and decide to follow him.
| Actor | Role |
|---|---|
| AAlexander HeidenreichOle | Ole |
| DDirk BartschAndreas | Andreas |
| PPeggy SteinerMarie | Marie |
| MMatthias KrohseJens | Jens |
 Swetlana SchönfeldOles Mutter | Oles Mutter |
 Gert GrasseOles Vater | Oles Vater |
| RRenate HeymerAndreas Mutter | Andreas Mutter |
 Hilmar BaumannAndreas Vater | Andreas Vater |
 Peter BauseOberleutnant Vogel | Oberleutnant Vogel |
| DDietmar BurkhardLeutnant Büttner | Leutnant Büttner |
| GGesine LaatzFräulein Röder | Fräulein Röder |
 Hartmut SchreierHerr Franke | Herr Franke |
| AAndreas SchumannHerr Neumann | Herr Neumann |
 Doris ThalmerFrau Grabowski | Frau Grabowski |
 Fred DelmareOpa Tönnchen | Opa Tönnchen |
 Hellena BüttnerNot listed | Not listed |
| UUrsula StaackNot listed | Not listed |
 Ulrich VoßNot listed | Not listed |