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Friday (Jack Webb) and Smith (Ben Alexander) investigate when 33 small businessmen have been victimized by forged checks within a two-month period. The main suspect is veteran forger Stanley Bubeck, but Bubeck was in jail at the time the bogus checks were passed. Further evidence suggests that the perpetrator is a so-called travelling salesman who needs a lot of money to sustain his lifestyle--which includes two wives in two different cities! This episode is based on the Dragnet radio broadcast of August 31, 1950.