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Loosely based on the real espionage cases of Soviet Agent Harry Gold and Britain's Atomic Scientist Klaus Fuchs, the picture develops its anti-Red theme in such simple blacks & whites that it becomes a rather obvious thriller. In Alfred Werker's plodding direction of a talky screenplay. Walk East on Beacon moves at a too-leisurely pace for an action picture. Lending a bit of credulity to the proceedings are actual backgrounds filmed in Washington, New Hampshire and Boston.