William Eythe is the Customs Agent in this brisk Columbia programmer. The plot finds Bert Stewart (Eythe) stationed in China, where he goes undercover to join a gang of dope smugglers. His plan is to stop the wholesale stealing of valuable streptomycin, which the crooks are peddling to drug addicts. Marjorie Reynolds will surprise fans of her work in TV's The Life of Riley with her portrayal of the gang-leader's moll. Another TV favorite, Jim Backus, co-stars as one of the good guys. Customs Agent makes no demands upon the intellect but does succeed as slam-bang entertainment. ~ Hal Erickson, Rovi