The series must have had a great effect on me as it is one of the few programs that I can still recall from over 40 years ago. It must have been on Friday nights, as we didn't have television at home and I only got to watch it when we were visiting an elderly aunt, which we always did on Fridays.
Both William Mervyn and Edwin Litchfield sadly passed away in their 60s. Keith Barron continues to entertain us, but whatever happened to Christopher Quinee (South)? I can't recall ever seeing him in anything after The Odd Man.
I'm sure it would seem very dated today, as we have become used to the slick production and amazing special effects of modern-day police series.