The one hundred eleventh TV show: #494 Kommisar Rex
There are plenty of crime shows out there and while some may get by on sheer talent, you'll usually need some sort of hook to get people interested. In the case of Kommisar Rex, it's the titular Rex, a police dog who joins Vienna's homocide unit after his handler is killed in an explosion.
He gets adopted by the charismatic Moser and the two form a crime fighting team. The dog himself is the obvious star - while he may not be able to speak, he's been trained to make sure he can convey a lot of different emotions - it's a real actor and you can feel for him from the first time you see him on screen, depressed about what happened to his owner. He comes across as clever - as smart as any human - and the show is at its best when he really gets to show off.
The second star - Moser at first, although he leaves later and gets competently replaced with quite a different character - works well, as a fairly competent cop with the occasional blind spot Rex helps him solve. It stands out from the beginning how much chemistry he has with the dog. The story goes that this was a normal crime show, but Tobias Moretti showed up to his audition with a dog and that worked well enough that they decided to work it into the show. It shows in how he always interacts with Rex, even when it's not scripted - he's always encouraging him and connecting and it works really well.
Add to that how the secondary cast works well - they're competent, with the comic relief coming from their interactions with Rex. Not as an enemy (and they are shown to care a lot for each other) but by annoying each other and, in particular, a lot of theft and sharing of ham rolls. Both the dogs and the characters in the show love them, and they're often comedic beats that occasionally turn into more touching moments.
There are a lot of these episodes, and the quality ones are mostly in the early seasons, but during this the show is immensely entertaining, while not shying away from the more difficult topics - there's plenty of deaths, bomb threats and hostages to stay busy.