Action and excitement beckon as popular sleuth Mick Cardby goes on the trail of a missing girl, and finds himself in the clutches of a gang of blackmailers.
| Actor | Role |
|---|---|
 James MasonMick Cardby | Mick Cardby |
 Mary ClareMatron | Matron |
 Margaret VynerMollie Bennett | Mollie Bennett |
 Gordon McLeodInsepctor Cardby | Insepctor Cardby |
 Frederick ValkDr. Moger | Dr. Moger |
 Barbara EverestMrs. Cardby | Mrs. Cardby |
| BBarbara JamesLena Morne | Lena Morne |
 G.H. MulcasterLord Morne | Lord Morne |
| EEric ClaveringAl | Al |
| TTerry ConlinDetective Sergeant Trotter | Detective Sergeant Trotter |
 W.G. FayMr. Eslick | Mr. Eslick |
 Brefni O'RorkeDr. Crosbie | Dr. Crosbie |
 Michael RennieInspector | Inspector |