Friday (Jack Webb) and Smith (Ben Alexander) begin by investigating a series of truck hijackings, and end up with a strange case of "in-law trouble" on their hands. The perpetrator turns out to be truck driver, who had turned to crime merely to prove to his mother-in-law that he wasn't a failure. Perennial Dragnet stock-company players Peggy Webber and Vic Perrin are in fine form in this episode, which was based on the same-named radio broadcast of August 23, 1951. ~ Hal Erickson, Rovi