DS Makepeace's full name was Lady Harriet Alexandra Charlotte Makepeace.
Dempsey drove a 1984 Mercedes SL (white in series one and two and silver in series 3) and Makepeace a Ford Escort 1.6i Cabriolet (silver in series one and two and Diamond white in series 3).
At the time of production, this was the most expensive series produced primarily for British prime-time television, although it was made with on eye on trying to sell it to a US TV network.
Superintendent Spikings never answered his desk phone politely "Hello", instead he always answered abruptly "Who's That?".