On the other hand, well made time travel plots are great.

There is nothing in-between.

The only one that comes to mind is DARK.

Yes. Good example (although s3 was nearing shark infested waters).

Dr Who has episodes like Blink.

Russian doll S2

Life on mars (UK version is better)

Future man (deserves a lot more love)

Oh ya, Russian Doll and Future Man, good call on those.

Though Russian Doll kept the future immutable. I thought that was a much smarter way of incorporating the time travel.