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A sinister crook is implicated in blackmail, greed for emeralds, a secret formula and murder. Thee episodes from a 1952 British television series called "Inspector Morley, Late of Scotland Yard, Investigates" were joined together and released theatrically.

Tod Slaughter
Terence Reilly

Patrick Barr
Insp. Morley
Tucker McGuire
Eileen Trotter

Ingeborg von Kusserow
Marie (as Ingeborg Wells)
Frank Hawkins
Insp. Cranshaw
Leonard Sharp
Mullins (as Len Sharp)
Anne Valery
Susan
David Davies
George