The two hundred and twenty-fifth TV show: #22 Dixon of Dock Green
There's something quite gentle about Dixon of Dock Green. There's some darker cases, but on the whole it doesn't feel violent or angry, instead sticking with quieter interpretations of life. The police mysteries and stories are there, but it's still a bit staid. It develops through the years, from what I've seen but I also know other shows start after this that build on this further. It fits its time, but it's not hard to see how it reached the point where it was ready to end.