A burglar at large in Los Angeles has the curious habit of leaving small mementos at the scene of each crime. Unfortunately, he doesn't leave behind any fingerprints, so Friday (Jack Webb) and Smith (Ben Alexander) must seek out other means of identifiying the burglar. The detectives finally get a solid lead courtesy of a random snapshot. A young Robert Vaughn plays a minor role in this 1958 episode. ~ Hal Erickson, Rovi