the long memory (1953)

"Funny what tricks your memory plays on you isn't it."
Falsely imprisoned for murder on the testemony of a number of people, Phillip Davidson (John Mills) has only one thought once he finishes his sentance, revenge. But trailing him is Bob Lowther (John McCallum), the inspector who originally put him away, who is just as determined to get to the bottom of the case.
Fine use of little known parts of London, such as the marshes, add a distinct flavour to this fine crime drama.