@izzythepush,
Well, Id consider seven seasonsw as a fairly long run. I guess GUNSMOKE is the longest running of any show. I think that Doc Mrtin took its formula from Northern Exposure
1self centered main character who is a physician with several major tics
2Heeroine who has a unique profession and is no shrinking violet
3a matriarch/pqtriarchal chqracter who represents the law or is an"eaarth mother
4several wacky characters ,
I actually like "Death In Paradise" for an ensemble Brit mystery.
Martin Clunes, shedding his "Sheldon-like" character, has a good series about Island ecology . Hes travelling all over the earth searching out unique island habitats .
The really good BBC stuff are the vast library of nature series. They are usually done with writing, and photography in a sustained production agreements with WUHB of Boston. Those are excellent and Im pissed that mst all US nature series have recently taken a disgusting turn to be only entertaining and absent all information. Truthfully, the Austrliqn natural history series also reach for some kind of cartoonish presentation. Ever since Bill Bryson set that "Sort of model" that EVERYTHING IN AUSTRALIA WILL KILL YA !!. producers seem to concentraate on that alone.