Dear John was a post-Taxi series for Judd Hirsch and ran on NBC for a few seasons. It was great and, like Taxi, was cancelled way too soon. For those who watch OTA, it was on Antenna TV on Buffalo subcarrier channel 2.2 for a few years.
As for CBC Gem, a lot of people know I'm not a huge fan of the Corp. But I have to admit, its website is really worth exploring if you've never been there. In addition to the Canadian shows, which many of us can take or leave, they have a ton of stuff from the U.S. and overseas which you won't find for free anywhere else.
Critical hits like Killing Eve is there. So is Pen15. the entire series of the U.K. comedy Ghosts (which the CBS series is based on), Poker Face (which otherwise airs on Peacock), and the Showtime series "Masters of Sex," based on the lives of sex researchers Masters & Johnson. I've seen that one and it's pretty good.
The CBC site, does indeed, have a few "Gems" and even if you haven't signed in or joined, it's worth taking a tiptoe through the titles just to see what non-Canadian programming is there. And as I always say, you can't beat free.