The famous forensic phonetician Matthias Hegel is a luminary in his field. Even the slightest deviation in the sound of a voice is enough for him to distinguish truth from lies and thus convict criminals. But now the police consultant confesses to having committed a gruesome murder.
| Actor | Role |
|---|---|
 Janina FautzJula Ansorge | Jula Ansorge |
 Juergen MaurerMatthias Hegel | Matthias Hegel |
 Nico KleemannFriedrich von Würzburg | Friedrich von Würzburg |
| AAdrian MaaßElyas Ansorge | Elyas Ansorge |
 Tanja de WendtObdachlose | Obdachlose |
 Inga DietrichMichaela Proehl | Michaela Proehl |
 Peter MikluszHeiko | Heiko |
 Martin OntropTuchmann | Tuchmann |
| EEneko SanzPolizist | Polizist |
 Emanuela von FrankenbergPetra Kramer | Petra Kramer |
| CChristopher PattenStruck | Struck |
 Eva WeißenbornMargot Conradi | Margot Conradi |
 Joachim Paul AssböckGangster | Gangster |
 Geraldine GuyDr. Gisela Verbelow | Dr. Gisela Verbelow |
 Jona HansenMarcel Ernst | Marcel Ernst |
 Samuel SchneiderMoritz Ansorge | Moritz Ansorge |
 Max BretschneiderPaul Wagner | Paul Wagner |
 Andreas SchrödersOswald Holder | Oswald Holder |
| AAlexander SimonPeer Kalinsky | Peer Kalinsky |