A private detective and his young assistant solve crimes.
| Actor | Role |
|---|---|
 Langhorn BurtonSexton Blake | Sexton Blake |
 Mickey BrantfordTinker | Tinker |
 Fred RaynhamGeorge Marsden Plummer | George Marsden Plummer |
| TThelma MurrayNot listed | Not listed |
 Leslie PerrinsFairbairn | Fairbairn |
| PPhilip DesboroughNot listed | Not listed |