Secret Agent X-9 (1937) is a Universal film serial based on the comic strip Secret Agent X-9 by Dashiell Hammett and Alex Raymond.
He takes the bank receipt to an art shop, where Marker, a paid accomplice, conceals it between an oil painting and its frame.
Dexter arrests Blackstone and pursues Marker with the full intention of unmasking Brenda.
Secret Agent X-9 was based on the comic strip by Dashiell Hammett (writer) and Alex Raymond (artist).
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