- Country: UK
- Genres: Drama
- Release: 1953-10-02
- Director: Vernon Sewell
- Writers: Guy Elmes , Gaston Lazare , Julian Symons
- Language: English
- Stars: Dermot Walsh , Hazel Court , Hermione Baddeley (1906–1986) , Alexander Gauge (1914–1960) , Bill Travers , Archie Duncan , James Vivian , Frederick Schrecker , John Penrose , Hugh Latimer
- Runtime: 68 min
- Awards: N/A
- AKA: Mörder unter weißer Maske , Undercover Agent (United States of America) , Counterspy (United Kingdom) , Counterspy
- Plot: An auditor comes into possession of an envelope containing prints and drawings which the British government is anxious to obtain and also a great many other people, all of whom try to get them from him by any means. He escapes many of the traps set for him by the villains, but is finally captured and is tied to an operating table where the gang leader is set to do some scalpel work on him.
- IMDB:tt0162918
Undercover Agent Cast · · · ALL
Vernon Sewell
Director
Dermot Walsh
Frank Manning
Hazel Court
Clare Manning
Hermione Baddeley
(1906–1986)
Madame Del Mar
Alexander Gauge
(1914–1960)
Smith
Bill Travers
Rex
Archie Duncan
Jim Fenton
James Vivian
Larry Fenton
Frederick Schrecker
Plattnaur
John Penrose
Paulson
Hugh Latimer
Inspector Barlow
Beryl Baxter
Plattnauer's Accomplice
Gwen Bacon
Matron
Maxwell Foster
Dr. Stevenson
Monti DeLyle
Dance Director
Howard Lang
Policeman