It’s an ongoing show. It’s on season 7 now. Came out this fall and it’s renewed for season 8. Maybe it’s regional with pbs but it never showed here. I believe Netflix and prime had first few seasons but it stopped.

Are you talking about Shetland Viking frontier movie? It was about Shetland wild life and was on PBS. But that’s not the tv show I was referring to

I checked pbs website as I watch stuff on the site too and Shetland isn’t on there either