Friday (Jack Webb and Smith (Ben Alexander) are certain that career criminal Louis Roat (Paul Burke), recently released from prison, is the man behind a series of holdups. Retracing Roat's steps, the detectives discover that among other things, he'd been attending a night-school class--in criminology! Caught red-handed, Roat confesses to the holdups and is sent back to the same jail whence he came. As it turns out, however, Roat had been carefully preparing a breakout during his previous incarceration. . .and now he's on the loose again. This episode is based on the Dragnet radio broadcast of June 8, 1954. ~ Hal Erickson, Rovi