Eleven unsolved holdups have occurred in the past three months. The robbers invariably target jewely stores and supermarkets, and have left behind precious few clues. Acting upon a tip from a reformed convict, Friday (Joe Friday and Smith (Ben Alexander) launch a search for a "big guy" named Chet and a "little guy" named Vince--and also place Chet's girlfriend under 24-hour surveillance, a task which proves a lot harder than it sounds. This episode was adapted from the Dragnet radio broadcast of April 5, 1953. ~ Hal Erickson, Rovi