In the opening sequence when the credits run, Nick and Nora pull up with their dog Asta in an unusual very limited production car. It is an Italian bodied Dual Ghia with Chrysler underpinnings, frame, and engine. The sophisticated couple with their dog in tote going on adventures each week probably was at least in part an inspiration for the later day Hart to Hart (1979). The resemblance of Phyllis Kirk to Stefanie Powers and Peter Lawford to Robert Wagner seems more than a coincidence.
This series was a "TV remake" of one of MGM's most successful franchises from their "Golden Era" - Between 1932 and 1945, William Powell and Myrranda Loy co-starred in seven Thin Man films as Nick and Nora Charles.