The title of TV Asahi's new police drama, "Keiji Shichinin" ("Seven Detectives"; Thurs., 9 p.m.), is meant to strike a chord with older viewers who will remember "Shichinin no Keiji," one of the most popular series of the 1960s — a cop show that wasn't about action but real police work, and which tackled up-to-the-minute social topics.