

"The ultimate exercise in controlled terror."
A British agent's son is kidnapped and held for a ransom of diamonds. The agent finds out that he can't even count on the people he thought were on his side to help him, so he decides to track down the kidnappers himself.
Maj. John Tarrant

Cedric Harper

Ceil Burrows

Alf Chestermann

McKee

Chief Supt. Wray

Alex Tarrant

Lady Melissa Julyan

Sir Edward Julyan

Bateson

Monitoring Policeman

Mike McCarthy

Jane Harper
Miss Monley

Ilkeston
Margaret
MI5 Man

Hetty

Gen. St. John

Jacques (uncredited)

Shadow (uncredited)
Doctor (uncredited)
M15 Man (uncredited)
Pincus (uncredited)
Secretary (uncredited)
Jeweller (uncredited)

M15 Man (uncredited)
Manageress (uncredited)
Commuter (uncredited)

Tourist (uncredited)
Customs Officer (uncredited)
