In their search for a diamond thief, Friday (Jack Webb) and Smith (Ben Alexander) visit a bar frequented by the suspect. Their search is temporarily sidelined when bar employee Alice Kolbar is beaten to death by her jealous husband. It turns out that Alice may have been romantically involved with the alleged jewel thief...but the only real evidence the detectives have to go on is a custom-made hat with the initials "T.R." This episode is based on the Dragnet radio broadcast of February 15, 1955. ~ Hal Erickson, Rovi