Interpol Calling: Season 1, Episode 33
The Three Keys (24 Apr. 1960)
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Interpol discover a number of bank vaults that rather than be robbed have had all their money switched for counterfeit notes. Duval and his team have to work out how the crime was committed and who is responsible.
Writers:Robert Banks Stewart (teleplay) (as Robert Stewart) , Connery Chappell (teleplay), 1 more credit »