Hello, Mysha. Yes, I get a catalog from an outfit called Acorn, and they sell the Gently episodes in digital form. However, one the things I like best about the books is the author's beautiful descriptions of natural settings, and I don't suppose television preserves those.

Not that Inspector Gently always worked in England. He had cases in Scotland and in France, for example.
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I find TV programs based on books pretty disappointing, usually. I dipped into some Jeeves and Wooster and found I couldn't understand the actors and I couldn't even tell which was which. It's obvious from the books that Jeeves, the uncle Bertie needed but never had, is 20, even 30 years older than Bertie. Heaven knows what they did with all the jokes.