A cellist is murdered during a symphony concert. Shortly afterwards, the manager of the hall is found dead, an apparent suicide. But is it?
| Actor | Role |
|---|---|
 Donald MeekDr. Crabtree | Dr. Crabtree |
 John HamiltonInsp. Carr | Insp. Carr |
| RRita LanLouisa Von Link | Louisa Von Link |
 Douglass DumbrilleGiuseppe Benito | Giuseppe Benito |
 Herbert BraggiottiNicky Petroff | Nicky Petroff |
 Edward KeaneSergeant | Sergeant |
 Almira SessionsConcert-Goer (uncredited) | Concert-Goer (uncredited) |