Oh, you were so careful about avoiding spoilers in your post, I used a rot13 encoder/decoder to ask a question about a plot point I thought I remembered, without wanting someone passing by to accidentally get spoiled :D Here it is:

Potential spoiler below

There was something about domes in the future... and then they realised that they must have changed something because a dome that had been destroyed wasn't??

Is that season 1, I wonder? 🤔