In a curious "stolen identity" episode (based on a Dragnet radio program first heard on July 7, 1951), Friday (Jack Webb) investigates when old Mr. Grady (Anthony Jochim) thinks that he has been reunited with his grandson Donald. It turns out that there are several inconsistencies in the stories told by both Grady and by the youngster (David Stollery) claiming to be the grandson. The whole truth, however, is not revealed until several months later--and even devoted Dragnet fans won't be able to predict the outcome of this one. Ben Alexander makes his first TV appearance as Friday's partner, officer Frank Smith. ~ Hal Erickson, Rovi